50 x 3 / 5 = 30 children are boys. So, there are 50 - 30 = 20 children that are girls.
The answer: 20
Reverse engineering the question: There are 50 children at the party. Three-fifths of them are boys. How many of the children are girls?


Reasoning and answer: He has enough milk to make 18 milkshakes because 72 / 4 = 18. He has enough ice cream to make 16 milkshakes because 192 / 12 = 16. He can only make 16 milkshakes because 16 < 18. He will use 64 ounces of milk because 16 x 4 = 64. He will have 8 ounces of milk left because 72 - 64 = 8.
The answer: 8
What was the question?
Question: Blake wants to spend his Friday making milkshakes for his family. He knows that he needs 4 ounces of milk and 12 ounces of ice cream for each milkshake. If he has 72 ounces of milk and 192 ounces of ice cream, how much milk will be left over when he is done?


Since the distance that Mairead jogged is 3 / 5 times the miles she ran, she jogged for 3 / 5 * 40 = 24 miles. The total distance that she covered while running and jogging is 24 + 40 = 64. She also walked for 5 * 24 = 120 miles for her exercise. She covered 120 + 64 = 184 miles while doing her exercise.
The answer: 184
Reverse engineering the question: When doing her exercises, Mairead runs for 40 miles, walks for 3/5 times as many miles as she ran, and walks for five times the number of miles she jogged. Calculate the total distance Mairead has covered while doing her exercises.


Reasoning and answer: Four pieces of lollipop cost $2x 4 = $8. A pack of chocolate costs $8 so 6 packs cost $8 x 6 = $48. The total amount that she needs to pay is $8 + $48 = $56. Blake gave the cashier $10 x 6 = $60. So, her change is $60 - $56 = $4.
The answer: 4
What was the question?
Question: Blake bought 4 lollipops and 6 packs of chocolate. If each lollipop costs $2 and a pack of chocolate costs the same as four lollipops, how much change will Blake get back if he gave the cashier 6 $10 bills?


Dimes are worth $0.10 and Barry has $10.00 worth of dimes so he has 10 / .10 = 100 dimes. Dan has half the amount of dimes as Barry so Dan has 100 / 2 = 50 dimes. Dan finds 2 more dimes on his way home so he now has 50 + 2 = 52 dimes.
The answer: 52
Reverse engineering the question: Barry has $10.00 worth of dimes. His little brother, Dan has half that amount but finds 2 more dimes on his way home from school. How many dimes does Dan have?


100000(.20) = 20000$ down payment. 100000 - 20000 = $80000 remaining. 80000(.30) = 24000. 80000 - 24000 = 56000$.
The answer: 56000
Reverse engineering the question:

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
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Roger bought a house for $100,000. He was able to pay 20% down, and his parents paid off an additional 30% of the remaining balance. How much money does Roger still owe on his house?