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Anthony keeps a bottle of vinegar in his cupboard for 2 years. Each year 20% of the vinegar evaporates. What percent of the vinegar is left after 2 years?

First find what percent of the vinegar is still in the bottle after each year: 100% - 20% = 80% Then multiply the amount of vinegar left after one year by the percentage left after each year to find how much is left after 2 years: 80% * 80% = 64% #### 64

Samir climbed 318 stairs yesterday. Veronica climbed 18 more than half that amount. How many stairs did Veronica and Samir climb together yesterday?

Half of 318 is <<318/2=159>>159 159 + 18 = <<159+18=177>>177 stairs 318 + 177 = <<318+177=495>>495 Together they climbed 495 stairs yesterday. #### 495

Trip wanted to watch the new action movie in theaters. An evening ticket cost $10 and a large popcorn & drink combo would cost him an additional $10. He noticed on their website, they had a special offer. From 12 noon to 3 pm, save 20% off tickets and 50% off any food combos. How much money could Trip save by going to the earlier movie?

An evening movie is $10 and the food combo would be $10 so 10 + 10 = $<<10+10=20>>20 If he goes to an earlier movie, it's 20% off the normal ticket price of $10 so 10 * .20 = $<<10*.20=2>>2 If he goes to an earlier movie, it's 50% off the normal food price of $10 so 10 * .50 = $<<10*.50=5>>5 If he saves $2 for the ticket and $5 on food, then 2+5 = $<<2+5=7>>7 saved #### 7

There are 50 goldfish in the pond. Each goldfish eats 1.5 ounces of food per day. 20% of the goldfish need to eat special food that costs $3 an ounce. How much does it cost to feed these fish?

There are 10 fish who need the special food because 50 x .2 = <<50*.2=10>>10 These fish eat 15 ounces a day because 10 x 1.5 = <<10*1.5=15>>15 This food costs $45 because 15 x 3 = <<15*3=45>>45 #### 45

One pie costs $4 for a piece. Each pie is having 3 pieces. During one hour the bakery can make 12 pies. Creating one pie costs the bakery $0.5. Considering the bakery would be able to sell all pie pieces, how much money would it make?

If the bakery can make 12 pies, this means there would be 12 * 3 = <<12*3=36>>36 pie pieces. For all the pieces the bakery would make 36 * 4 = $<<36*4=144>>144. The cost of making 12 pies is 12 * 0.5 = $<<12*0.5=6>>6. That means the bakery would make 144 - 6 = $<<144-6=138>>138. #### 138

Daniel owns a textile company. Every Monday he delivers 20 yards of fabric, and every Tuesday he delivers twice the amount of fabric he delivers on Monday. Every Wednesday, he delivers 1/4 of the amount of fabric he delivers on Tuesday. If each yard of fabric costs $2 and each yard of yarn costs $3, how much does he earn from Monday to Wednesday?

Every Tuesday, Daniel delivers 20 x 2 = <<20*2=40>>40 yards of fabric. Every Wednesday, he delivers 40 x 1/4 = <<40*1/4=10>>10 yards of fabric. Thus, he delivers a total of 20 + 40 + 10 = <<20+40+10=70>>70 yards of fabric from Monday to Wednesday. Therefore, Daniel earns $2 x 70 = $<<2*70=140>>140 from it. #### 140

Alice and Emily are selling oranges at the farmer's market. Alice sold twice as many oranges as Emily did. In total, they sold 180 oranges. How many oranges did Alice sell?

Emily sold 180/3=<<180/3=60>>60 oranges. Alice sold 60*2=<<60*2=120>>120 oranges. #### 120

A pool has 48 blue tiles and 32 red tiles. If the pool needs 100 tiles to be completed, how many more tiles are needed?

The pool currently has 48+32 = <<48+32=80>>80 tiles. The pool needs 100-80 = <<100-80=20>>20 more tiles to be completed. #### 20

Annie calculated she has three times more toys than Mike, and two less than Tom. Mike has 6 toys. How many toys do Annie, Mike, and Tom have in total?

Annie has three times more toys than Mike, which means she has 3 * 6 = <<3*6=18>>18 more toys than Mike. Annie has a total of 18+6= <<18+6=24>>24 toys. Tom has two toys more than Annie, so he has 24 + 2 = <<24+2=26>>26 toys. In total Annie, Mike, and Tom have 6 + 24 + 26 = <<6+24+26=56>>56 toys. #### 56

Aaron is gathering can lids to take to the recycling center. He uses 3 equal-sized boxes of canned tomatoes and adds the lids he gets to the 14 can lids he already has. He is now taking 53 can lids to the recycling center. How many cans lids did he get from each box?

Calculating the difference between the can lids Aaron has now and the amount that he had initially shows there were 53 – 14 = <<53-14=39>>39 can lids in the boxes of canned tomatoes. As the boxes are the same size, splitting these can lids equally shows that there were 39 / 3 = <<39/3=13>>13 can lids in each box. #### 13

Chenny bought 9 plates at $2 each. She also bought spoons at $1.50 each. How many spoons did Chenny buy if she paid a total of $24 for the plates and spoon?

The cost of 9 plates is $2 x 9 = $<<2*9=18>>18. So, Chenny paid $24 - $18 = $<<24-18=6>>6 for the spoons. Therefore, she bought $6/$1.50 = <<6/1.5=4>>4 spoons. #### 4

A 1000 car parking lot is divided into 3 sections. There are 320 spaces in section 1, and 200 more in section 2 than in section 3. How many spaces are made available in section 2 of the parking lot?

There are a total of 1000 spaces - 320 spaces = <<1000-320=680>>680 spaces in both sections 2 and 3. Let the number of spaces in section 3 be x. The number of spaces in section 2 = x + 200. We know that 320 + x + 200 + x = 1000. Combining like terms, we get 2x = 480 Dividing both sides by 2 produces x = 240. The number of spaces in section 2 is 240 + 200 = <<240+200=440>>440. #### 440

When you take Hiram's age and then add 12, you get 4 less than twice Allyson's age. If Hiram is 40 years old, how old is Allyson?

If Hiram's age is 40, when you add 12, his age becomes 40+12=<<40+12=52>>52 If you add 4 from Hiram's age after adding twelve to his age, you get 52+4 = 56, which is twice Allyson's age. Allyson's age is 56/2 = <<56/2=28>>28 years #### 28

There were 60 women at the party, and three-fourths of these women were married and brought their husbands with them to the party. If 3/4 of the men at the party were single, how many people attended the party?

60 x 3/4 = <<60*3/4=45>>45 females are married which means there are also 45 married males. If 1/4 of the men are married, which represents 45 men, then 4*45=<<4*45=180>>180 is the total number of men who attended the party. Thus, there are a total of 60 women and 180 men, or a total of 60+180=<<60+180=240>>240 people at the party. #### 240

Rob has 24 baseball cards, and a few are doubles. One third of Rob's cards are doubles, and Jess has 5 times as many doubles as Rob. How many doubles baseball cards does Jess have?

Rob has 24/3=<<24/3=8>>8 doubles baseball cards. Jess has 8*5=<<8*5=40>>40 doubles baseball cards. #### 40

John starts climbing a very steep hill. He travels 1 foot vertically for every two feet horizontally. His elevation increases from 100 feet to 1450 feet. How far does he move horizontally, in feet?

He travels 1450-100=<<1450-100=1350>>1350 feet vertically So he travels 1350*2=<<1350*2=2700>>2700 feet horizontally #### 2700

The cost of building a certain house in an area is 100,000 more than the construction cost of each of the houses in the area. But it sells for 1.5 times as much as the other houses, which sell at $320,000 each. How much more profit is made by spending the extra money to build?

The house cost 320,000*1.5=$<<320000*1.5=480000>>480,000 So it is worth 480,000-320,000=$<<480000-320000=160000>>160,000 more than other houses So the profit is 160,000-100,000=$<<160000-100000=60000>>60,000 more #### 60,000

Bob picked 450 apples for his entire family to eat. There are 33 children in his family, and each of them ate 10 apples. If every adult ate 3 apples apiece, how many adults are in his family?

The 33 children ate a total of 33 * 10 = <<33*10=330>>330 apples. There were 450 - 330 = <<450-330=120>>120 apples left for the adults to eat. If every adult ate 3 of the 120 apples left, then there were 120 / 3 = <<120/3=40>>40 adults in the family. #### 40

In the school's library, there are 2300 different books. 80% of all the books are in English, but only 60% of these books were published in the country. How many English-language books have been published outside the country?

There are 80/100 * 2300 = <<80/100*2300=1840>>1840 books in English at the library. Out of these books, only 60/100 * 1840 = <<60/100*1840=1104>>1104 were published inside the country. So there are 1840 - 1104 = <<1840-1104=736>>736 books in English published outside of the country. #### 736

James decides to replace his car. He sold his $20,000 car for 80% of its value and then was able to haggle to buy a $30,000 sticker price car for 90% of its value. How much was he out of pocket?

He sold his car for 20000*.8=$<<20000*.8=16000>>16,000 He bought the new car for 30,000*.9=$<<30000*.9=27000>>27,000 That means he was out of pocket 27,000-16,000=$<<27000-16000=11000>>11,000 #### 11000

John was 66 inches tall. He had a growth spurt and grew 2 inches per month for 3 months. How tall is he in feet?

He gained 2*3=<<2*3=6>>6 inches So his height is 66+6=<<66+6=72>>72 inches So he is 72/12=<<72/12=6>>6 feet tall #### 6

A swarm of ants discovered a pile of sugar that spilled from a dropped bag. They begin to harvest it and carry it off to their anthill. Every hour, the ants remove 4 ounces of sugar. The bag of sugar held 24 ounces before it was dropped. After three hours, how many more hours will the ants need to harvest the remaining sugar?

After 3 hours, the ants have removed 4 * 3 = <<4*3=12>>12 ounces of sugar. There are 24 - 12 = <<24-12=12>>12 ounces of sugar left. Thus, the ants need 12 / 4 = <<12/4=3>>3 more hours to harvest the remaining sugar. #### 3

Justin needs to read at least 100 pages or more of his book in one week to pass his class. He has read 10 pages already on the first day. Assuming he reads twice the amount of pages as the first day each day in the remaining 6 days, how many pages will he have read after the week is over?

10 pages per day on day 1 * 2 = <<10*2=20>>20 pages per day for days 2 through 7 20 * 6 remaining days = <<20*6=120>>120 pages total from days 2 through 7 10 pages day 1 + 120 pages days 2 through 7 = <<10+120=130>>130 total pages read in one week #### 130

Michael has two brothers. His oldest brother is 1 year older than twice Michael's age when Michael was a year younger. His younger brother is 5 years old, which is a third of the age of the older brother. What is their combined age?

The oldest brother is 15 because 3 x 5 = <<3*5=15>>15 Michael is 8 because if 1 + (Michael's age - 1) x 2 = 15 then Michael's age = 8 Their combined age is 28 because 5 + 15 + 8 = <<5+15+8=28>>28 #### 28

There are 6 dogs and 2 ducks in the garden. How many feet are there in the garden?

6 dogs have 6 x 4 = <<6*4=24>>24 feet. 2 ducks have 2 x 2 = <<2*2=4>>4 feet In total there are 24 + 4 = <<24+4=28>>28 feet in the garden #### 28

Matt and Blake want to watch every episode of the show The Office. There are 201 episodes. If they watch 1 episode every Monday and 2 episodes every Wednesday each week, how many weeks will it take them to watch the whole series?

Each week, they watch 1 Monday + 2 Wednesday episodes = <<1+2=3>>3 episodes a week. If you take 201 total episodes / 3 episodes each week = <<201/3=67>>67 weeks to watch The Office series. #### 67

A luxury bag costs $3000. A reseller wants to get a 15% profit. How much should she sell the bag?

The reseller wants to get $3000 x 15/100 = $<<3000*15/100=450>>450 profit. Thus, she needs to sell it for $3000 + $450 = $<<3000+450=3450>>3450. #### 3450

John plants a plot of 3 trees by 4 trees. Each tree gives 5 apples. He sells each apple for $.5. How much money does he make, in dollars?

He has 3*4=<<3*4=12>>12 trees So he has 12*5=<<12*5=60>>60 apples So he sells the apples for 60*.5=$<<60*.5=30>>30 #### 30

Bill's roof can bear 500 pounds of weight. If 100 leaves fall on his roof every day, and 1000 leaves weighs 1 pound, how many days will it take for his roof to collapse?

First, find how many leaves the roof can hold: 500 pounds * 1000 leaves/pound = <<500*1000=500000>>500000 leaves Then divide that by the number of leaves that fall each day to find how many days before the roof collapses: 500000 leaves / 100 leaves/day = <<500000/100=5000>>5000 days #### 5000

A sack of rice, which is 50 kilograms, costs $50. If David sells it for $1.20 per kilogram, how much will be his profit?

David's revenue for the 50 kilograms of rice is $1.20 x 50 = $<<1.20*50=60>>60. So, his profit is $60 - $50 = $<<60-50=10>>10. #### 10

Kim loves to knit sweaters and can knit as many as 10 sweaters in a day if she gets the time. On a particular week, she knit 8 sweaters on Monday, 2 more sweaters on Tuesday than on Monday, 4 fewer sweaters on both Wednesday and Thursday than on Tuesday, and half the number of sweaters she had knit on Monday on Friday. Calculate the total number of sweaters she knit that week.

If she knit 8 sweaters on Monday and 2 more on Tuesday, she knit 8+2 = <<8+2=10>>10 sweaters on Tuesday. The total number of sweaters she had knit on Monday and Tuesday is 10+8 = <<10+8=18>>18 On Wednesday, she knit four fewer sweaters than the number she knit on Tuesday, which totals 10-4 = <<10-4=6>>6 sweaters. By Wednesday, she had knit 18+6 = <<18+6=24>>24 sweaters. On Thursday, she knit the same number of sweaters she had knit on Thursday, giving a total of 24+6 = <<24+6=30>>30 sweaters. On Friday, she knit half the number of sweaters she had knit on Monday, which totals 1/2*8 = <<8*1/2=4>>4 sweaters on Friday. So far, she has knit 30+4 = <<30+4=34>>34 sweaters by Friday. #### 34

Derek was 6 years old when he had three times as many dogs as cars. Ten years later, after selling some of his dogs and buying 210 more cars, the number of cars became twice the number of dogs. How many dogs does Derek have now if he had 90 dogs when he was six years old?

At six years old, with three times as many dogs as cars, Derek had 90/3 = <<90/3=30>>30 cars. Ten years later, after buying 210 more cars, Derek has 210+30 = <<210+30=240>>240 cars. Since the number of cars is twice as many as the number of dogs, Derek currently has 240/2 = <<240/2=120>>120 dogs #### 120

If Janet reads 80 pages a day and Belinda reads 30 pages a day, how many more pages does Janet read in 6 weeks?

First find the total number of days in 6 weeks: 6 weeks * 7 days/week = <<6*7=42>>42 days Then find the total difference in the number of pages Janet and Belinda read each day: 80 pages/day - 30 pages/day = <<80-30=50>>50 pages/day Then multiply the daily difference by the number of days to find the total difference in the number of pages they read: 50 pages/day * 42 days = <<50*42=2100>>2100 pages #### 2100

A spiral notebook costs $15, and a personal planner costs $10. How much would it cost in total to buy 4 spiral notebooks and 8 personal planners at a 20% discount?

If a spiral notebook cost $15, a 20% discount would reduce the price by 20/100 *15 = $<<15*0.2=3>>3 At a 20% discount, the buying price of a spiral notebook book is $15-$3= $<<15-3=12>>12 At the same discount, a personal planner cost would reduce by 20/100 * $10 = $<<20/100*10=2>>2 The new buying price of a personal planner will be $10-$2 =$<<10-2=8>>8 To buy four spiral notebooks at a 20% discount, you'll pay 4*$12 = $<<4*12=48>>48 At the same time discount, you'll buy eight personal planners at a cost pf 8*$8 = <<8*8=64>>64 In total, to buy eight personal planners and four spiral notebooks, you'd have to pay $64+$48 = $112 #### 112

Mia is a student. In her final year, she spent 1/5 of her day watching TV and 1/4 of the time left on studying. How many minutes did she spend studying each day?

If Mia spent 1/5 of her day watching TV, her remaining time in a day is 5/5 – 1/5 = 4/5 for other things. So, the time left is 24 * 4/5 = <<24*4/5=19.2>>19.2 hours The time spent studying is 19.2 /4 = <<19.2/4=4.8>>4.8 hours. In minutes, that is 4.8 * 60 = <<4.8*60=288>>288 minutes #### 288

For the funfair, the school organizers ordered 30 rolls of tickets. Each roll of tickets has 100 tickets. The 4th graders bought 30% of the tickets while the 5th graders bought 50% of the remaining tickets. Then the 6th graders bought a total of 100 tickets. How many tickets were left unsold?

There were a total of 30 x 100 = <<30*100=3000>>3000 tickets ordered by the school organizers. The 4th graders bought 3000 x 30/100 = <<3000*30/100=900>>900 tickets. So, there were 3000 - 900 = <<3000-900=2100>>2100 tickets left for the other two grade levels. The 5th graders bought 2100 x 50/100 = <<2100*50/100=1050>>1050 tickets. So, 2100 - 1050 = <<2100-1050=1050>>1050 tickets were left then. Since 100 tickets were bought by the 6th graders, therefore 1050 - 100 = <<950=950>>950 tickets were left unsold. #### 950

James earns $10 per week as an allowance. After saving all his money for four weeks, he spends half of it on a new video game. He then spends a quarter of what is left to buy a new book. How much money does he have left?

He starts out with $10 * 4 = $<<10*4=40>>40. James spend $40 / 2 = $<<40/2=20>>20 on the video game. After buying the game, he has $40 - $20 = $<<40-20=20>>20 left. He spent $20 / 4 = $<<20/4=5>>5 on the book. He has $20 - $5 = $<<20-5=15>>15 left. #### 15

A global gym decides to replace all of its cardio machines. They have 20 gyms. Each gym has 10 bikes, 5 treadmills, and 5 elliptical machines. The bikes cost $700 each. The treadmills cost 50% more than that. The elliptical machines are twice as expensive as the treadmills. How much does it cost to replace everything?

The gym needs to buy 20*10=<<20*10=200>>200 bikes 20*5=<<20*5=100>>100 each of treadmills and ellipticals So the bikes cost 200*700=$<<200*700=140000>>140,000 The treadmills cost 700*1.5=$<<700*1.5=1050>>1,050 each So they cost a total of 1050*100=$<<1050*100=105000>>105,000 The ellipticals each cost 1050*2=$<<1050*2=2100>>2100. So in total the ellipticals cost 2100*100=$<<2100*100=210000>>210,000 So the total cost of everything is 140,000+105,000+210,000=$<<140000+105000+210000=455000>>455,000 #### 455,000

Dani brings two and half dozen cupcakes for her 2nd-grade class. There are 27 students (including Dani), 1 teacher, and 1 teacher’s aid. If 3 students called in sick that day, how many cupcakes are left after Dani gives one to everyone in the class?

Dani brings 2.5 x 12 = <<2.5*12=30>>30 cupcakes. She needs this many cupcakes to feed everyone in class 27 + 2 = <<27+2=29>>29. With the 3 students calling in sick, there are this many people in class today 29 - 3 = <<29-3=26>>26. There are this many cupcakes left after everyone gets one 30 - 26 = <<30-26=4>>4 cupcakes. #### 4

Jerry had 63 pieces of candy. He divided them up equally into 9 bags. 2 of the bags had chocolate hearts. 3 of the bags were chocolate kisses. The rest of the bags were not chocolate. How many pieces of candy were not chocolate?

Jerry had 63 pieces of candy / 9 bags = <<63/9=7>>7 pieces of candy per bag. There were chocolate hearts in 2 bags * 7 = <<2*7=14>>14 chocolate hearts. There were chocolate kisses in 3 bags * 7 = <<3*7=21>>21 chocolate kisses. There was a total of 21 + 14 chocolate candy = <<21+14=35>>35 chocolate. Jerry started with 63 pieces - 35 chocolate = <<63-35=28>>28 pieces of non-chocolate candy. #### 28

Maria is baking cookies for Sally. Sally says that she wants 1/4 of her cookies to have nuts in them, 40% to have chocolate chips in them, and the remainder to have nuts and chocolate chips in them. When she adds nuts to the cookies, she uses 2 nuts per cookie. If she makes 60 cookies, how many nuts does she need?

35% of the cookies have nuts and chocolate chips because 100 - 25 - 40 = <<100-25-40=35>>35 60% of the cookies have nuts in them because 25 + 35 = <<25+35=60>>60 She makes 36 cookies with nuts in them because 60 x .6 =<<36=36>>36 She needs 72 nuts because 36 x 2 = <<36*2=72>>72 #### 72

Sol sells candy bars to raise money for her softball team. On the first day, she sells ten candy bars and sells four more candy bars than she sold the previous day each day afterward. If she sells six days a week and each candy bar costs 10 cents, how much will she earn in a week in dollars?

Sol will sell 10 + 4 = <<10+4=14>>14 candies on the second day. She will sell 14 + 4 = <<14+4=18>>18 candies on the third day. She will sell 18 + 4 = <<18+4=22>>22 candies on the fourth day. She will sell 22 + 4 = <<22+4=26>>26 candies on the fifth day. She will sell 26 + 4 = <<26+4=30>>30 candies on the sixth day. She will sell a total of 10 + 14 + 18 + 22 + 26 + 30 = <<10+14+18+22+26+30=120>>120 candies in a week. Hence, she will earn 120 x 10 = <<120*10=1200>>1200 cents. Since 1 dollar is equal to 100 cents, then Sol will earn 1200/100 = $<<1200/100=12>>12 #### 12

Jane is painting her fingernails. She applies a base coat that takes 2 minutes to dry, two color coats that take 3 minutes each to dry, and a clear top coat that takes 5 minutes to dry. How many minutes total does Jane spend waiting for her nail polish to dry?

First figure out how long both color coats will take to dry: 3 minutes * 2 = <<3*2=6>>6 minutes Then add up the time for the base coat, top coat, and color coats: 6 minutes + 2 minutes + 5 minutes = <<6+2+5=13>>13 minutes #### 13

Ray has 95 cents in nickels. If Ray gives 25 cents to Peter, and twice as many cents to Randi as he gave to Peter, how many nickels does Ray have left?

Ray gave 25*2 = <<25*2=50>>50 cents to Randi. Ray has 95-25-50 = <<95-25-50=20>>20 cents in nickels left. Ray has 20/5 = <<20/5=4>>4 nickels. #### 4

Carolyn counts 6 monkeys and 6 birds in the tree outside her window. Then two of the monkeys each eat one bird. What percent of the animals outside her window are monkeys now?

First find the new number of birds: 6 birds - 2 birds = <<6-2=4>>4 birds Then find the new total number of animals: 6 monkeys + 4 birds = <<6+4=10>>10 animals Then divide the number of monkeys by the number of animals and multiply by 100% to express the answer as a percentage: 6 monkeys / 10 animals * 100% = 60% #### 60

Heaven and her younger brother want to buy school supplies, so they ask their father for money, who gives them $100 in total to use. Heaven buys two sharpeners and four notebooks at $5 each, and her brother uses the remaining amount to buy ten erasers at $4 each and some highlighters. How much money did Heaven's brother spend on highlighters?

Heaven spent 2*5=$<<2*5=10>>10 on sharpeners. She also spent 4*5 = $<<4*5=20>>20 on notebooks. Heaven's brother used 10*4 = $<<10*4=40>>40 to buy erasers. The total amount of money Heaven and her sister spent on sharpeners, notebooks, and erasers is 40+20+10 = $<<40+20+10=70>>70 The total amount of money her brother spent on highlighters is 100-70 =$<<100-70=30>>30 #### 30

Julie works at a restaurant that pays her an hourly rate of $5. She works 8 hours a day and 6 days a week. How much is her monthly salary if she was not able to go to work for a day?

Julie's daily earnings are $5 x 8 = $<<5*8=40>>40. Her weekly earnings are $40 x 6 = $<<40*6=240>>240. Her monthly earnings are $240 x 4 = $<<240*4=960>>960. Since she was not able to work for a day, her salary will be $960 - $40 = $<<960-40=920>>920. #### 920

James buys 3 packs of candy. He pays with a $20 bill and gets $11 change. How much did each pack of candy cost?

The candy cost 20-11=$<<20-11=9>>9 So he pays 9/3=$<<9/3=3>>3 per candy #### 3

Three-quarters of the oil from a 4000-liter tank (that was initially full) was poured into a 20000-liter capacity tanker that already had 3000 liters of oil. How many more liters of oil would be needed to make the large tanker half-full?

Three-quarters of oil from the initially full 4000-liter tank would be 4000*(3/4)= <<4000*3/4=3000>>3000 liters In addition to the 3000 liters that were already in the large tanker, there are 3000+3000 = <<3000+3000=6000>>6000 liters in it now. The tanker would be filled to half capacity by (1/2)*20000 = <<(1/2)*20000=10000>>10000 liters of oil There are 10000-6000 = <<10000-6000=4000>>4000 liters left to reach half capacity. #### 4000

A mother duck as 8 ducklings. The first 3 ducklings find 5 snails each. Another 3 ducklings find 9 snails each, and the remaining ducklings each find half the number of snails that mother duck finds. If mother duck finds tree times the total number of snails as the first 2 groups of ducklings, how many snails does the family of ducks have collectively?

The first 3 ducklings find 3 x 5 = <<3*5=15>>15 snails The next 3 ducklings find 3 x 9 = <<3*9=27>>27 snails They find a total of 15 + 27 = <<15+27=42>>42 snails Mother duck finds 42 x 3 = <<42*3=126>>126 snails The last group has 8 - 3 - 3 = <<8-3-3=2>>2 ducklings They find 126/2 = <<126/2=63>>63 snails each The family of ducks found a total of 42 +126 + 63 + 63 = <<42+126+63+63=294>>294 snails #### 294

It takes a dog groomer 10 minutes to dry a short-haired dog like a beagle. It takes him twice as long to dry a full-haired, fluffy dog like a german shepherd. One morning, he has 6 short-haired dogs to dry and 9 full-haired dogs to dry. How many hours does it take him to dry all of the dogs?

It takes 10 minutes to dry the coat of a short-haired dog and twice as long for a full haired dog so they take 10*2 = <<10*2=20>>20 minutes to dry He had 6 short hair dogs and they took 10 minutes to dry each so they took 6*10= <<6*10=60>>60 minutes to dry He had 9 full haired dogs that took 20 minutes to dry each so they took 9*20 = <<9*20=180>>180 minutes to dry Together is takes him 60+180 = <<60+180=240>>240 minutes to dry all of the dogs 60 minutes are in 1 hour and he spends 240 minutes on the dogs so he worked for 240/60 = <<240/60=4>>4 hours drying the dogs #### 4

Reina has three times the number of counters and four times the number of marbles as Kevin. If Kevin has 40 counters and 50 marbles, calculate the number of counters and marbles that Reina has?

If Kevin has 40 counters, and Reina has three, the number of counters Kevin has, Reina has 3*40 = <<40*3=120>>120 counters. Reina also has four times the number of marbles that Kevin has, meaning he has 4*50 = <<4*50=200>>200 marbles. In total, Reina has 120 counters + 200 marbles = <<120+200=320>>320 items. #### 320

Teresa scored 70 marks in science, 80 in music, 85 in social studies, and the physics exam, which was the hardest test that Teresa had ever taken in her entire life, she scored half as many marks as she scored in music. Calculate the total marks Teresa scored in all the subjects.

The total marks of science and music are 70+80 = <<70+80=150>>150 When you add the marks she scored in social studies, the full marks become 150+85 = <<150+85=235>>235. She scored half as many marks in physics as she scored music, totaling 1/2*80 = 40 marks. When you add the marks she scored in physics to the total marks of the other subjects, the full marks become 235+40 = <<235+40=275>>275 #### 275

There are 30 fish in the tank. One third of them are blue, and half of the blue fish have spots. How many fish in the tank are blue, spotted fish?

There are 30/3=<<30/3=10>>10 blue fish. There are 10/2=<<10/2=5>>5 blue spotted fish. #### 5

Claudia offers art classes to kids and charges $10.00 for her one-hour class. If 20 kids attend Saturday’s class and half that many attend Sunday’s class, how much money does she make?

Sunday’s class is half the size of Saturday’s class with 20 kids so Sunday has 20/2 = <<20/2=10>>10 kids She has 20 kids on Saturday and 10 kids on Sunday for a total of 20+10 = <<20+10=30>>30 kids She charges $10.00 per kid and teaches 30 kids over the weekend so she makes 10*30 = $<<10*30=300.00>>300.00 #### 300

A store owner repacked his oils into 200 mL bottles. He was able to make 20 bottles. How many liters of oil did the store owner have?

Twenty bottles of oil is equal to 200 mL x 20 = <<20*200=4000>>4000 mL. Since 1 liter is equal to 1000 mL, then the store owner had 4000/1000 = <<4000/1000=4>>4 liters of oil. #### 4

Jon runs a website where he gets paid for every person who visits. He gets paid $0.10 for every person who visits. Each hour he gets 50 visits. His website operates 24 hours a day. How many dollars does he make in a 30 day month?

He makes 50*$.10=$<<50*.10=5>>5 per hour So he makes $5*24=$<<5*24=120>>120 per day So he makes $120*30=$<<120*30=3600>>3600 a month #### 3600

There are two ponds side by side in a park. Pond A has twice as many frogs as Pond B. If there are 32 frogs in Pond A, how many frogs are there in both ponds combined?

Pond B has 32/2 frogs = <<32/2=16>>16 frogs. In total the ponds have 32 frogs + 16 frogs = <<32+16=48>>48 frogs. #### 48

A box of rainbow nerds contains 10 purple candies, 4 more yellow candies, and 2 fewer green candies than yellow candies. How many rainbow nerds are there in the box?

There are 10 + 4 = <<10+4=14>>14 yellow candies. There are 14 - 2 = <<14-2=12>>12 green candies. There are 10 + 14 + 12 = <<10+14+12=36>>36 rainbow nerds candies in the box. #### 36

Alexis can sew a skirt in 2 hours and a coat in 7 hours. How long does it take for Alexis to sew 6 skirts and 4 coats?

It takes Alexis 2 x 6 = <<2*6=12>>12 hours to sew 6 skirts It takes Alexis another 7 x 4 = <<7*4=28>>28 hours to sew 4 coats. In total it takes Alexis 12 + 28 = <<12+28=40>>40 hours to sew 6 skirts and 4 coats. #### 40

Stormi is saving up to buy a bicycle. She washes 3 cars for $10 each. She mows 2 lawns for $13 each. If the bicycle she wants costs $80, how much more money does Stormi need to make to afford the bicycle?

The total amount of money from washing cars is 3 * $10 = $<<3*10=30>>30 The total amount of money from mowing lawns 2 * $13 = $<<2*13=26>>26 The total amount of money Stormi makes is $30 + $26 = $<<30+26=56>>56 Stormi still needs to make $80 - $56 = $<<80-56=24>>24 #### 24

Pat’s computer password is made up of several kinds of alphanumeric and symbol characters for security. He uses a string of eight random lowercase letters, a string half that length of alternating upper case letters and numbers, and one symbol on each end of the password. How many characters in all is Pat‘s computer password?

The second string of characters is half as long as the first string, so it is 8 / 2 = <<8/2=4>>4 characters long. The password has one symbol on each end, so it has 1 * 2 = <<1*2=2>>2 symbol characters. In all, Pat’s computer password is 8 + 4 + 2 = <<8+4+2=14>>14 characters long. #### 14

Sonia and Joss are moving to their new house at the lake. They have too much stuff in their previous house and decide to make multiple trips to move it all to the new house. They spend 15 minutes filling the car with their stuff and spend 30 minutes driving from the previous house to the new house. Fortunately, they did not waste any time unloading their stuff into the new house. In total they make 6 trips to complete the move. How many hours did they spend moving?

They spend 15 minutes/trip + 30 minutes/trip = <<15+30=45>>45 minutes/trip filling the car and driving to the new house. They had to take 6 trips, so they spend 45 minutes/trip x 6/trip = <<45*6=270>>270 minutes. They also had to drive back to their previous house 5 times to complete the move: 30 minutes/trip x 5 trips = <<30*5=150>>150 minutes. In total, they spent 270 minutes + 150 minutes = <<270+150=420>>420 minutes. Each hour has 60 minutes so they spent 420 minutes ÷ 60 minutes/hour = <<420/60=7>>7 hours in total. #### 7

Bubba bought a new two-story warehouse. When empty, the first floor of the building contains twice as much floor space for storage as the second floor. The first items he brought into his empty building were several thousand boxes; and he put them all on the second floor, which filled one-quarter of the second floor storage space. If the boxes used up 5,000 square feet of storage space, how many square feet of storage space is still available in the building?

If 5,000 square feet represents one-quarter of the second floor storage space, then the second floor has 5,000*4=<<5000*4=20000>>20,000 square feet of storage space. Since the first floor has twice as much space as the second floor, then the first floor has 20,000*2=<<20000*2=40000>>40,000 square feet of storage space. Altogether, when empty, the entire building has 20,000+40,000=<<20000+40000=60000>>60,000 square feet of storage space. Since the second floor has 5,000 square feet of storage space filled with boxes, then there are 60,000-5,000=55,000 square feet of unused storage space still available in the building. #### 55,000

Donald went to a computer store. He saw a 15% reduction in the price of the laptop he wants to buy. If the laptop originally costs $800, how much will he pay for the laptop?

There was $800 x 15/100 = $<<800*15/100=120>>120. Thus, Donald will pay $800 - $120 = $<<800-120=680>>680. #### 680

Isaac cut his 30 meters ribbon into 6 equal parts. He then used 4 parts of the ribbon. How many meters of ribbon are not used?

Each part is 30/6 = <<30/6=5>>5 meters long. Since Liam used 4 parts, then he used 5 x 4 = <<4*5=20>>20 meters of the ribbon. So, 30 - 20 = <<30-20=10>>10 meters of ribbon is not used. #### 10

Jerry paid off some of his debts. Two months ago, he paid $12 while last month, he paid $3 more. If his debt was $50 in all, how much does he still have to pay?

Jerry paid $12 + $3 = $<<12+3=15>>15 last month. He paid a total of $12 + $15 = $<<12+15=27>>27 for two months. Therefore, Jerry still has to pay $50 - $27 = $<<50-27=23>>23. #### 23

It is recommended that men should consume no more than 150 calories of added sugar per day. Mark took a soft drink in the afternoon that contained 2500 calories, 5% of which was from added sugar. Then he bought some bars of candy which had 25 calories of added sugar each. If he eventually exceeded the recommended intake of added sugar by 100%, how many bars of candy did he take?

He consumed 2500 calories, 5% of which is added sugar to give 2500*(5/100) = <<2500*(5/100)=125>>125 calories of added sugar. He exceeded the recommended intake of 150 calories by 100% for a total consumption of 150+(150(100/100)) = $<<150+(150*100/100)=300>>300 This means he took in 300-125 = <<300-125=175>>175 calories from candy alone Each candy had 25 calories so 175 calories which means he consumed 175/25 = <<175/25=7>>7 bars? #### 7

John's grill messes up and burns half his steak. He eats 80% of what isn't burned. If the steak was originally 30 ounces how much steak did he eat?

There were 30*.5=<<30*.5=15>>15 ounces of unburnt steak So he ate 15*.8=<<15*.8=12>>12 ounces of steak #### 12

Fifteen more than a quarter of a number is 27. What is the number?

A quarter of the number is 27-15=<<27-15=12>>12. The number is 12*4=<<12*4=48>>48. #### 48

A man drives 60 mph for 3 hours. How fast would he have to drive over the next 2 hours to get an average speed of 70 mph?

To have an average speed of 70 mph over 5 hours he needs to travel 70*5=<<70*5=350>>350 miles. He drove 60*3=<<60*3=180>>180 miles in the first 3 hours He needs to travel another 350-180=<<350-180=170>>170 miles over the next 2 hours. His speed needs to be 170/2=<<170/2=85>>85 mph #### 85

Jack is a soccer player. He needs to buy two pairs of socks and a pair of soccer shoes. Each pair of socks cost $9.50, and the shoes cost $92. Jack has $40. How much more money does Jack need?

The total cost of two pairs of socks is $9.50 x 2 = $<<9.5*2=19>>19. The total cost of the socks and the shoes is $19 + $92 = $<<19+92=111>>111. Jack need $111 - $40 = $<<111-40=71>>71 more. #### 71

Russel and Jen went to the circus. Jen played a shooting game twice, while Russel rode the carousel three times. If the shooting game costs 5 tickets and the carousel costs 3 tickets. How many tickets did they use?

Jen used 5 x 2 = <<5*2=10>>10 tickets in the shooting game. Russel used 3 x 3 = <<3*3=9>>9 tickets in the carousel. Therefore, they used 10 + 9 = <<10+9=19>>19 tickets in all. #### 19

Rachel and Sara want to attend a beauty and modeling contest. They both want to buy new pairs of shoes and dresses. Sara buys a pair of shoes which costs $50 and a dress which costs $200. How much should Rachel budget if she wants to spend twice as much as what Sara spent on the pair of shoes and dress?

The cost Rachel should budget for her pair of shoes is $50 * 2 = $<<50*2=100>>100. The cost Rachel should budget for her dress is $200 * 2 = $<<200*2=400>>400. The total Rachel should budget is $100 + $400 = $<<100+400=500>>500. #### 500

Ben bought a lawnmower for his garden. He paid $100 for it. After six months, the value of the mower dropped by about 25%. Over the next year, the value of the mower dropped another 20% in value. How much is Ben's lawnmower worth after this time?

The first value drop of the lawnmower was 25/100 * 100 = $<<25/100*100=25>>25. So the lawnmower was worth 100 - 25 = $<<100-25=75>>75. Over the next year, the value dropped another 20%, which is 20/100 * 75 = $<<20/100*75=15>>15. So after all this time, Ben's lawnmower is worth 75 - 15 = $<<75-15=60>>60. #### 60

A farmer has three trucks to carry water to his farm. Each truck uses three tanks with a capacity of 150 liters of water. How many liters of water in total can the farmer carry in his trucks?

1 truck uses 3 tanks of 150 liters, so a truck can carry 3 tanks per truck * 150 liters = <<3*150=450>>450 liters per truck. The total amount of water the 3 trucks carry is 3 trucks * 450 liters per truck= <<3*450=1350>>1350 liters. #### 1350

Edmund owns a gift wrapping shop, he uses 18 inches of gift wrapper per gift box. If Edmund has 90 inches of gift wrapper per day, how many gift boxes will he be able to wrap every 3 days?

Edmund can wrap 90/18 = <<90/18=5>>5 gift boxes per day. Therefore, he will be able to wrap 5 x 3= <<5*3=15>>15 gift boxes every 3 days. #### 15

James was doing some shopping in his favorite shop and he saw an offer on shoes that give him a second pair of shoes for half off the original price. He took the offer and took the first pair of shoes for $40 and the second one for $60. At the cashier, the lady told him that the offer applies strictly to the cheaper pair of shoes, and also that he was selected for an extra discount of a fourth off the total amount. How much money did James end up paying for both pairs of shoes?

The price of the cheaper pair after the discount was $40/2 = $<<40/2=20>>20 The total price of both pairs of shoes $20 + $60 = $<<20+60=80>>80 The final discount was $80/4 = $<<80/4=20>>20 The price he ends up paying was $80 - $20 = $<<80-20=60>>60 #### 60

Lily types 15 words a minute and takes a 2-minute break every 10 minutes. How long does it take for Lily to type 255 words?

It would take Lily 255 words / 15 wpm = <<255/15=17>>17 minutes to type without taking a break. Since Lily takes a break after 10 minutes of typing she takes 17 minutes + 2 minutes = 19 minutes #### 19

Caleb and his dad went fishing at the lake. Caleb caught 2 trouts and his dad caught three times as much as Caleb. How many more trouts did his dad catch compared to Caleb?

Caleb’s dad caught 2 x 3 = <<2*3=6>>6 trouts. His dad caught 6 - 2 = <<6-2=4>>4 more trouts than Caleb. #### 4

Adam's father deposited $2000 in the bank. It receives 8% interest paid throughout the year, and he withdraws the interest as soon as it is deposited. How much will Adam’s father have, including his deposit and the interest received after 2 and a half years?

The annual interest is 2000 * 8/100 = $<<2000*8/100=160>>160. Interest for two and a half years is 160 * 2.5 = $<<160*2.5=400>>400. So, Adam's father will have 2000 + 400 = $<<2000+400=2400>>2400 after 2 and a half years. #### 2400

Clyde's four children wanted to go see their favorite band perform. The tickets were expensive so Clyde made a deal with his kids. If the average of their scores on their next math test was higher than 89, then he would buy them tickets to the concert. June earned a 97 on her math test, Patty earned an 85, Josh earned a 100 on his test and Henry earned a 94. What was their average math test score?

Together, they scored 97+85+100+94 = <<97+85+100+94=376>>376 There are 4 children so their average math test score is 376/4 = <<376/4=94>>94 #### 94

Gabby planted a watermelon vine, a peach tree, and two plum trees in the spring. Over the summer, the plants grew and produced fruit. She only got one watermelon to grow, but she got twelve more peaches than that, and three times that number of plums. How many pieces of fruit did Gabby get to pick that summer?

Gabby’s peach tree grew 12 + 1 = <<12+1=13>>13 peaches. Her plum trees grew 13 * 3 = <<13*3=39>>39 plums. Thus, Gabby got 1 + 13 + 39 = <<1+13+39=53>>53 pieces of fruit to pick. #### 53

Sarah, Mary, and Tuan decided to go to the restaurant for a meal. They decided to split the cost of the meal evenly. If the total price of the meal comes to $67 and they have a coupon for $4, how much does each person need to contribute to the bill?

After using the coupon, the final price comes to 67 - 4 = <<67-4=63>>63 dollars. With three people, they each need to pay 63 / 3 = <<63/3=21>>21 dollars each. #### 21

On a four-day trip, Carrie drove 135 miles the first day, 124 miles more the second day, 159 miles the third day, and 189 miles the fourth day. If she had to charge her phone every 106 miles, how many times did she charge her phone for the whole trip?

Carrie drove 135 + 124 = <<135+124=259>>259 miles on the second day Carrie drove 135 + 259 + 159 + 189 = <<135+259+159+189=742>>742 miles for the whole trip. Carries charged her phone 742 / 106 = <<742/106=7>>7 times. #### 7

Maci is planning for the new school year and goes to the store to buy pens. She needs ten blue pens and 15 red pens. If a blue pen costs ten cents each and a red pen costs twice as much as the blue pen, how much money does Maci pay for the pens?

Maci pays 10 * $0.10 = $<<10*0.10=1>>1 for the blue pens. Each red pen costs 2*$0.10 = $<<2*0.10=0.20>>0.20 She pays 15*$0.20 = $<<15*0.20=3.00>>3.00 for the red pens. To buy all the pens she needs, Maci pays $3+$1= $<<3+1=4>>4 #### 4

John's cow weighs 400 pounds. It increased its weight to 1.5 times its starting weight. He is able to sell the cow for $3 per pound. How much more is it worth after gaining the weight?

The cow initially weighs 400*1.5=<<400*1.5=600>>600 pounds So it gained 600 - 400 = <<600-400=200>>200 pounds So its value increased by 200*$3 = $<<200*3=600>>600 #### 600

In a Math competition, Sammy scored 20 points, Gab scored twice as many as Sammy's score, while Cher scored twice as many as Gab's score. If their opponent scored 85 points, how many more points do they have than their opponent?

Gab scored 20 x 2 = <<20*2=40>>40 points. Cher scored 40 x 2 = <<40*2=80>>80 points. Their team scored 20 + 40 + 80 = <<20+40+80=140>>140 points. Therefore, they scored 140 - 85 = <<140-85=55>>55 more points than their opponent. #### 55

Roselyn gives Mara three times as many books as she gives Rebecca and remains with 60 books. If Rebecca received 40 books, how many books did Roselyn have before?

If Roselyn gave Rebecca 40 books, and Mara was given three times as many books, Mara has 3*40 = 120 books. Rebecca and Mara's total number of books is 120+40 = <<120+40=160>>160 books. If Roselyn gave Mara and Rebecca her books, which is 160, then she initially had 60+160 = <<60+160=220>>220 books. #### 220

Corna wants to buy a shirt. The store buys the shirt for $20, but charges 30% for profit. However, the shirt is on sale for 50% off the selling price. What is the price now?

First find how much the store makes in profit: $20 * 0.30 = $<<20*0.30=6>>6 for profit Then find the regular selling price: $20 + $6 = $<<20+6=26>>26 total price Then multiply the regular price by the discount to get $26 * 0.50 = $<<26*0.50=13>>13 for the final price #### 13

It’s February 2021. Mark was born in January 1976. Graham is 3 years younger than Mark, and Graham’s sister, Janice, is 1/2 the age of Graham. How old is Janice?

It’s 2021 and Mark was born in 1976 so Mark is 2021-1976 = <<2021-1976=45>>45 years old Graham is 3 years younger than Mark who is 45 so Graham is 45-3 = 42 years old Janice is 1/2 the age of Graham who is 42 so Janice is 42/2 = <<42/2=21>>21 years old #### 21

A casino table pays 3:2 if you get a blackjack with your first 2 cards. If you scored a blackjack and were paid $60, what was your original bet?

The payout for blackjack is 3:2 or 3/2=1.5 times my bet If my original bet was X then I won 1.5*X my bet Given that I was paid $60 we know $60 = 1.5X X=$60/1.5 X=$<<40=40>>40 was my original bet #### 40

Mitchell is trying to chew as many pieces of gum at once as he can. He has 8 packets of gum, There are 7 pieces in each. If he chews all the gum except for 2 pieces, how many pieces does he chew at once?

The packets have 56 pieces in total because 8 x 7 = <<8*7=56>>56 He chews 54 pieces because 56 -2 = <<56-2=54>>54 #### 54

Orlan gave one-fourth of his 20-meter rope to Allan. He then gave two-thirds of the remaining to Jack. How many meters of rope is left to Orlan?

Orlan gave Allan 20 x 1/4 = <<20*1/4=5>>5 meters of rope. So he had 20 - 5 = <<20-5=15>>15 meters left. Then he gave 15 x 2/3 = <<15*2/3=10>>10 meters of the rope to Jack. Therefore, Orlan is left with 15 - 10 = <<15-10=5>>5 meters of rope. #### 5

Donna is trying to figure out if her truck is over a particular bridge's weight limit. The bridge can hold 20,000 pounds. Donna's empty truck weighs 12,000 pounds. She's carrying 20 crates of soda that each weigh 50 pounds, 3 dryers that each weigh 3000 pounds, and twice as much weight in fresh produce as in soda. How much does Donna's fully loaded truck weigh?

First find the total weight of the soda by multiplying the number of crates by the weight per crate: 20 crates * 50 pounds/crate = <<20*50=1000>>1000 pounds Then find the weight of the fresh produce by doubling the weight of the soda: 1000 pounds * 2 = <<1000*2=2000>>2000 pounds Now find the weight of the dryers by multiplying the quantity by the weight per item: 3 dryers * 3000 pounds/dryer = <<3*3000=9000>>9000 pounds Now add the empty truck's weight to the weight of all three groups of products to find the fully loaded weight: 12000 pounds + 1000 pounds + 2000 pounds + 9000 pounds = <<12000+1000+2000+9000=24000>>24000 pounds #### 24000

Mary tried to improve her health by changing her diet, but her weight bounced like a yo-yo. At first, she dropped a dozen pounds. Then, she added back twice the weight that she initially lost. Then, she dropped three times more weight than she initially had lost. But finally, she gained back half of a dozen pounds. If she weighed 99 pounds at the start of her change in diet, what was her final weight, in pounds?

Since Mary first weighed 99 pounds, after she dropped a dozen pounds she weighed 99-12=<<99-12=87>>87 pounds. Twice the weight she initially lost is 12*2=<<12*2=24>>24 pounds. So, when she added back twice the weight that she initially lost, her weight jumped to 87+24=<<87+24=111>>111 pounds. Three times more than she initially had lost is 12*3=<<12*3=36>>36 pounds. Therefore, when Mary lost 3 times more than she initially lost, her weight dropped to 111-36=<<111-36=75>>75 pounds. Finally, when Mary gained back half of a dozen pounds, her final weight was 75+6=<<75+6=81>>81 pounds. #### 81

Julie is making caesar salad for a family picnic. At the market, she spends $8 on green lettuce and $6 on red lettuce. If each type of lettuce costs $2 per pound, how many total pounds of lettuce did she buy?

The total cost of the green and red lettuce is $8 + $6 = $<<8+6=14>>14. Julie bought $14 / $2 =<<14/2=7>>7 pounds of lettuce. #### 7

Dawn earns 48,000 a year in 12 equal monthly payments. Each month, she saves 10% of her salary. How much does she save each month?

Dawn earns $4,000 a month because 48,000 / 12 = <<48000/12=4000>>4000 She saves $400 a month because 4,000 x .1 = <<4000*.1=400>>400 #### 400

John's piggy bank contains quarters, dimes, and nickels. He has three more dimes than quarters and 6 fewer nickels than quarters. If he has 63 coins, how many quarters does John have?

Let x represent the number of quarters John has Nickels: x-6 Dimes: x+3 Total:x+x-6+x+3=63 3x-3=63 3x=66 x=<<22=22>>22 quarters #### 22

Jill bought 5 packs of red bouncy balls and 4 packs of yellow bouncy balls. Each package contained 18 bouncy balls. How many more red bouncy balls than yellow bouncy balls did Jill buy?

Jill bought 5 packs * 18 red balls = <<5*18=90>>90 red balls. Jill bought 4 packs * 18 yellow balls = <<4*18=72>>72 red balls. Jill had 90 red – 72 yellow = <<90-72=18>>18 more red balls. #### 18