In 2 years, my dog will be 4 years old, so my dog is 4 - 2 = 2 years old now. So I am 15 + 2 = 17 years old now.
The answer: 17
Reverse engineering the question: My dog was born when I was 15 years old. Two years from now, my dog will turn 4 years old. How old am I now?


Reasoning and answer: The discount Maria got was 40 / 100 * 15 = $6. That means the price for her ticket was 15 - 6 = $9.
The answer: 9
What was the question?
Question: Maria bought a ticket to a ZOO. The regular price stands at $15, but she was able to get a 40% discount. How much did Maria pay for the ticket?


Jackie spends a total of 8 + 8 + 3 = 19 hours on work, exercise, and sleeping. Therefore he has 24 - 19 = 5 hours of free time.
The answer: 5
Reverse engineering the question: Jackie spends 8 hours working, 3 hours of exercise and spends 8 hours of sleep per day. How much free time does Jackie have?


Reasoning and answer: Paul has 10 hours of homework from weekdays because 2 x 5 = 10. He has 15 total hours because 5 + 10 = 15. He has 5 days to do his homework because 7 - 2 = 5. He needs to do 3 hours a night because 15 / 5 = 3.
The answer: 3
What was the question?
Question: Each week, Paul has 2 hours of homework on weeknights and 5 hours for the entire weekend. This week Paul has practice 2 nights out of the week and can't do any homework those nights. How many hours of homework does he have to average for the other nights to get his week's homework done?


First find the total tip amount: 20% * $200 = $40. Then subtract the friend's contribution: $40 - $10 = $30.
The answer: 30
Reverse engineering the question: Mark wants to tip his server 20% on a $200 check. If his friend agrees to kick in $10, how much should Mark add?


Tammy can eat twice as many pickle slices as Sammy who eats 15 so Tammy can eat 15 * 2 = 30 pickle slices. Ron eats 20% fewer pickle slices than Tammy who eats 30 pickle slices so that's .20 * 30 = 6 fewer slices than Tammy. Tammy eats 30 slices and Ron eats 6 less, then Ron eats 30 - 6 = 24 pickle slices.
The answer: 24
Reverse engineering the question:
Sammy can eat 15 pickle slices. His twin sister Tammy can eat twice as much as Sammy. Their older brother Ron eats 20% fewer pickles slices than Tammy. How many pickle slices does Ron eat?