Sam has half the number of Chris: 6 / 2 = 3 teslas. Elon has 10 more than Sam: 10 + 3 = 13 teslas.
The answer: 13
Reverse engineering the question: Elon has 10 more teslas than Sam who has half the number of teslas as Chris. Chris has 6 teslas. How many teslas does Elon have?


Reasoning and answer: 1 bar of soap will last for 2 months and there are 12 months in 1 year so she needs 12 / 2 = 6 bars of soap. Each bar of soap is $8.00 and she needs 6 bars so that's a total of 8 * 6 = $48.00.
The answer: 48
What was the question?
Question: Maria buys a large bar of French soap that lasts her for 2 months. She spends $8.00 per bar of soap. If she wants to stock up for the entire year, how much will she spend on soap?


Malcolm has bought 12 * 3 = 36 blue lights. This means he has bought a total of 12 + 36 + 6 = 54 colored lights. If he still needs to buy more lights, then he must have initially had 54 + 5 = 59 white lights.
The answer: 59
Reverse engineering the question: The lights in Malcolm’s house are flickering, and he hopes that replacing all of his white lights with colored lights will make it stop. He buys 12 red lights, 3 times as many blue lights, and 6 green lights. If he still has 5 colored lights left to buy, how many white lights did Malcolm have initially?


Reasoning and answer: Currently, Mark is reading books for 2 * 7 = 14 hours weekly. His goal is to read books, for 14 + 4 = 18 hours during one week.
The answer: 18
What was the question?
Question: Mark is reading books, for 2 hours each day. He decided to increase his time spent on reading books weekly, by 4 hours. How much time does Mark want to spend during one week on reading books?


Margo is 6 - 5 = 1 year old now. So, Margo will be 1 + 3 = 4 years old in three years.
The answer: 4
Reverse engineering the question: Benjie is five years older than Margo. If Benjie is 6 years old, how old will Margo be in three years?


Peter is 3 years older than Wayne who is 37 so Peter is 37 + 3 = 40 years old. Julia is 2 years older than Peter who is 40 so Julia is 2 + 40 = 42 years old. It's 2021 and Julia is 42 years old so she was born in 2021 - 42 = 1979.
The answer: 1979
Reverse engineering the question:
In 2021, Wayne is 37 years old. His brother Peter is 3 years older than him and their sister Julia is 2 years older than Peter. What year was Julia born in?