Rommel is 5 x 3 = 15 years old. Jenny is 15 + 2 = 17 years old. So, Tim is 17 - 5 = 12 years younger than Jenny.
The answer: 12
Reverse engineering the question: Tim is 5 years old. His cousin, Rommel, is thrice as old as he is. His other cousin, Jenny, is 2 years older than Rommel. How many years younger is Tim than Jenny?


Reasoning and answer: She gave 7 pens each to 44 students for a total of 7 * 44 = 308 pens. There are now 342 - 308 = 34 pens left. She left half of 34 pens in her locker which is 34 * (1 / 2) = 17 pens. She took 34 - 17 = 17 pens home.
The answer: 17
What was the question?
Question: Sally took 342 pens to her class of 44 students. If she gave 7 pens to each student, left half of the remainder in her locker, and took the rest home, how many did she take home?


Michael’s watermelon weighs 8 pounds and Clay’s weighs 3 times that so it weighs 8 * 3 = 24 pounds. John’s watermelon is half the size of Clay’s 24 - pound watermelon so it weighs 24 / 2 = 12 pounds.
The answer: 12
Reverse engineering the question: Michael’s largest watermelon weighs 8 pounds. His neighbor, Clay, grew a watermelon three times that size. And their mutual friend, John, grew a watermelon that was half the size of Clay’s. How big was John’s watermelon?


Reasoning and answer: Michael will spend $20 + $36 + $5 = $61. So, he needs $61 - $50 = $11 more to buy all those for his mom.
The answer: 11
What was the question?
Question: Michael has $50. He wants to surprise his mom on Mother's day by buying a cake for $20, a bouquet for $36, and a set of balloons for $5. How much more money does Michael need to buy all those?


Kendra made 2 * 6 = 12. Mari made 4 + 5 * 12 = 64.
The answer: 64
Reverse engineering the question: Mari made 4 more than five times as many decorated buttons as Kendra. Sue made half as many as Kendra. Sue made 6 buttons. How many did Mari make?


Thrice the number of chocolate squares that Mike ate is 20 squares * 3 = 60 squares. Jenny therefore ate 60 squares + 5 squares = 65 chocolate squares.
The answer: 65
Reverse engineering the question:
Jenny has a tummy ache. Her brother Mike says that it is because Jenny ate 5 more than thrice the number of chocolate squares that he ate. If Mike ate 20 chocolate squares, how many did Jenny eat?