148 * (1 / 4) = 37. 148 - 37 - 29 = 82. There are 82 peanuts left in the jar.
The answer: 82
Reverse engineering the question: There were 148 peanuts in a jar. Brock ate one-fourth of the peanuts and Bonita ate 29 peanuts. How many peanuts remain in the jar?


Reasoning and answer: Miss Adamson has a total of 4 x 20 = 80 students. Thus, she will use 80 x 5 = 400 sheets of paper for all of her students.
The answer: 400
What was the question?
Question: Miss Adamson has four classes with 20 students each. She makes a study guide for her class and uses 5 sheets of paper per student. How many sheets of paper will she use for all of her students?


He will use $250 in fuel because 5 x 50 = 250. He will be shark hunting for 300 minutes because 5 x 60 = 300. He can expect to see 30 sharks because 300 / 10 = 30. He will make $450 off these photos because 30 x 15 = 450. He will make $200 in profit because 450 - 250 = 200.
The answer: 200
Reverse engineering the question: Pat is hunting for sharks to take photos. For every photo he takes he earns $15. He sees a shark about every 10 minutes. His boat fuel costs $50 an hour. If he shark hunts for 5 hours, how much money can he expect to make in profit?


Reasoning and answer: First find the total number of liters a mosquito sucks in one feeding: 20 drops / 5000 drops / liter = .004 L / feeding. Then divide the lethal amount of blood by the amount of blood one mosquito can drain: 3 L / .004 L / feeding = 750 feedings.
The answer: 750
What was the question?
Question: A mosquito sucks 20 drops of blood every time it feeds on someone. If there are 5000 drops per liter and you have to lose 3 liters of blood to die, how many mosquitoes would have to feed on you to kill you?


He needs 1 can of frosting per layer cake and he needs to make 3 layer cakes so that's 1 * 3 = 3 cans of frosting. There are 6 dozen cupcakes,12 single cakes and 18 pans of brownies for a total of 6 + 12 + 18 = 36 orders. Each of the 36 orders needs 1 / 2 can of frosting so they need 36 * .5 = 18 cans of frosting. He needs 3 cans of frosting for the layer cakes and 18 cans for the remaining items for a total of 3 + 18 = 21 cans of frosting.
The answer: 21
Reverse engineering the question: Paul uses 1 can of frosting to frost a layer cake. He uses a half can of frosting for a single cake, or a single pan of brownies, or a dozen cupcakes. For Saturday, he needs to have 3 layer cakes, 6 dozen cupcakes, 12 single cakes and 18 pans of brownies ready and frosted for customer pick up. How many cans of frosting will he need?


The total amount of money that she lost is $400 + $500 = $900. If she remained with $900, she initially had $900 + $800 = $1700.
The answer: 1700
Reverse engineering the question:
Noemi lost $400 on roulette and $500 on blackjack. How much money did Noemi begin with if she still had $800 in her purse?