She found 10 quarters that are $0.25 each so she found 10 * .25 = $2.50. She found 3 dimes that are $0.10 each so she found 3 * .10 = $0.30. She found 3 nickels that are $0.05 each so she found 3 * .05 = $0.15. She found 5 pennies that are $0.01 each so she found 5 * .01 = $0.05. All total she found 2.50 + .30 + .15 + .05 = $3.00 in change.
The answer: 3
Reverse engineering the question: When Harriett vacuumed the sofa and chair she found 10 quarters, 3 dimes, 3 nickels, and 5 pennies. How much money did Harriett find?
Reasoning and answer: Shirley completed 36 x 2 = 72 questions. The sum of Fiona and Shirley's questions is 36 + 72 = 108. Kiana completed 108 / 2 = 54 questions. In one hour, they completed 108 + 54 = 162 questions. In two hours, they completed 162 x 2 = 324 questions.
The answer: 324
What was the question?
Question: Fiona completed 36 math questions in an hour. Shirley was able to complete twice as many math questions within that same time, and Kiana completed half of the sum of Fiona and Shirley's math questions. If they each did the same number of questions the following hour, how many math questions did all three girls complete in 2 hours?
4.5 gallons = 4.5 * 8 pints = 36 pints. 36 / 18 = 2 pints. Genevieve drank 2 * 3 = 6 pints of coffee.
The answer: 6
Reverse engineering the question: 4.5 gallons of coffee were divided among 18 thermoses. Genevieve drank 3 thermoses. How many pints of coffee did Genevieve drink?
Reasoning and answer: Deduct the amount saved from the total cost of the set. $65 - $35 = $30. Deduct the amount of money Gabby received from her mom. $30 - $20 = $10.
The answer: 10
What was the question?
Question: Gabby is saving money to buy a new makeup set. The makeup set costs $65 and she already has $35. Gabby's mom gives her an additional $20. How much money does Gabby need to buy the set?
Kate bought 7 packs 18 balls / pack = 126 red bouncy balls. She also bought 6 packs 18 balls / pack = 108 yellow bouncy balls. Kate bought 126 balls - 108 balls = 18 more red bouncy balls than yellow bouncy balls.
The answer: 18
Reverse engineering the question: Kate bought 7 packs of red bouncy balls and 6 packs of yellow bouncy balls. Each pack contained 18 bouncy balls. How many more red bouncy balls than yellow bouncy balls did Kate buy?
He bought 5 * 4 = 20 pounds of beef. So he paid 20 * 5.5 = $110.
The answer: 110
Reverse engineering the question:
James buys 5 packs of beef that are 4 pounds each. The price of beef is $5.50 per pound. How much did he pay?