First find the number of new vampires after one night: 5 people / vampire * 2 vampires = 10 people. Add that to the starting number of vampires to find the total number of vampires after one night: 10 vampires + 2 vampires = 12 vampires. Then find the number of new vampires on the second night: 5 people / vampire * 12 vampires = 60 people. Add that number to the starting number of vampires on the second night to find the total number of vampires after two nights: 60 vampires + 12 vampires = 72 vampires.
The answer: 72
Reverse engineering the question: Two vampires have come to the sleepy village of Willowton, population 300. Every night, each vampire turns 5 more people into vampires. How many vampires are there after two nights?


Reasoning and answer: Julia spend $40 / 2 = $20 on the game. After buying the game, she has $40 - $20 = $20 left. She spent $20 / 4 = $5 on in - game purchases. She has $20 - $5 = $15 left.
The answer: 15
What was the question?
Question: Julia has $40. She spends half of her money to buy a new game for her phone. She spends a quarter of what she has left on in-game purchases. How much money does she have left?


If each bulb uses 60 watts each day, the 40 bulbs that Allyn has uses 60 * 40 = 2400 watts of power each day. In June, with 30 days, the bulbs will use 30 * 2400 = 72000 watts of power. If Allyn is charged an electricity bill of twenty cents per power watt used, in June she will pay 72000 * $0.20 = $14400.
The answer: 14400
Reverse engineering the question: A sixty bulb watt uses 60 watts of power each day. If Allyn has 40 such bulbs in his house and pays an electricity bill of twenty cents per power watt used, calculate Allyn's total monthly expenses on electricity in June.


Reasoning and answer: Mary gives away 26 / 2 = 13 blue shirts. Mary gives away 36 / 3 = 12 brown shirts. Mary has 26 - 13 = 13 blue shirts left. Mary has 36 - 12 = 24 brown shirts left. Mary has 13 + 24 = 37 shirts left.
The answer: 37
What was the question?
Question: Mary has 26 blue shirts and 36 brown shirts. If she gives away half of her blue shirts and a third of her brown shirts, how many shirts does she have left?


Noah’s age is 2 * 6 = 12 years old. After 10 years Noah will be 12 + 10 = 22 years old.
The answer: 22
Reverse engineering the question: Noah’s age is twice Joe’s age. If Joe is 6 years old, how old will Noah be after 10 years?


The annual budget for policing is 32 / 2 = $16 million. The combined budget for education and policing is 16 + 12 = $28 million. There is 32 - 28 = $4 million to manage public spaces.
The answer: 4
Reverse engineering the question:
The town’s annual budget totals $32 million. If half of the budget goes towards policing and $12 million goes towards education. How much money is left for managing public spaces?