He takes 2 pages of notes every day for each of his 5 classes so that's 2 * 5 = 10 pages of notes. He takes 10 pages of notes every day for 5 days so that's 10 * 5 = 50 pages of notes. If he takes 50 pages of notes every week for 6 weeks that's 50 * 6 = 300 pages of notes. His notebook paper comes 100 pages per pack and he has taken 300 pages of notes so he used 300 / 100 = 3 packs of notebook paper.
The answer: 3
Reverse engineering the question: Chip takes 2 pages of notes every day, 5 days a week, for each of his 5 classes. His notebook paper comes in packs of 100 sheets of paper per pack. After 6 weeks, how many packs of notebook paper will Chip use?


Reasoning and answer: First, let’s calculate the total amount of money collected, which is 368 + 343 + 279 = $990. Let us now share this sum between the 5 classes: 990 / 5 = $198.
The answer: 198
What was the question?
Question: The local school is holding a big fair to raise money for 5 classes that want to go on a trip. 150 people came to the party and paid a total of $368 for entrance tickets. There was a raffle which brought in $343. The sale of cakes and drinks brought $279. At the end of the fair, the principal of the school shared the money raised between the 5 classes. How much money did each class receive?


After baking cookies, Lucy had 500 – 240 = 260g of flour left. She accidentally spilled half of this, which means she had 260 * 0.5 = 130g of flour left. She therefore needs 500 – 130 = 370g of flour.
The answer: 370
Reverse engineering the question: Lucy has been trying new recipes and wants to make sure she keeps the cupboard stocked with ingredients. She had a 500g bag of flour in the cupboard at the start of the week. She used 240g when she baked cookies on Tuesday, and accidentally spilled half of what was left when she was putting the flour away. If Lucy wants a full bag of flour in the cupboard, how much flour does she need to buy, in grams?


Reasoning and answer: Since Tony has 3 times as many fish as Billy's 10, that means Tony has 3 * 10 = 30 fish. Sarah has 5 more fish than Tony's 30, meaning she has 5 + 30 = 35 fish. Bobby has twice as many fish as Sarah does, meaning he has 35 * 2 = 70 fish. Therefore, altogether there are 10 + 30 + 35 + 70 = 145 fish.
The answer: 145
What was the question?
Question: Bobby has an aquarium with twice as many fish as Sarah's has. Sarah has 5 more fish in her aquarium than Tony does. Tony has 3 times as many fish in his aquarium as Billy does. Billy has 10 fish. How many fish do all 4 people have put together?


There are 7 days in one week so one week and 2 days = 7 + 2 = 9 days. Call the time Ethan spends learning tricks e. Alexa spent 9 days on vacation which is 3 / 4ths of the time Ethan spent learning 12 fencing tricks, hence (3 / 4)e = 9 days. If we multiply both sides of this equation by 4 / 3, we get e = (4 / 3) * 9 days = 12 days. Joey spent half of 12 days which is 12 / 2 = 6 days to learn swimming.
The answer: 6
Reverse engineering the question: Alexa was on vacation for 3/4ths of the time it took Ethan to learn 12 fencing tricks. Joey spent half as much this time (that Ethan spent learning the tricks) learning to swim. If Alexa spent a week and 2 days on vacation, how many days did it take Joey to learn swimming?


Sid has 12 x 2 = 24 sticks. Sam has 24 x 3 = 72 sticks. Thus, they have 24 + 72 + 12 = 108 popsicle sticks.
The answer: 108
Reverse engineering the question:
Sam, Sid, and Steve brought popsicle sticks for their group activity in their Art class. Sam has thrice as many as Sid, and Sid has twice as many as Steve. If Steve has 12 popsicle sticks, how many popsicle sticks can they use for their Art class activity?