Twice the number of Aaron's brothers is 6 + 2 = 8. Aaron has 8 / 2 = 4 brothers.
The answer: 4
Reverse engineering the question: Aaron has some brothers. Bennett has 6 brothers. If the number of Bennett's brothers is two less than twice the number of Aaron's brothers, what is the number of Aaron's brothers?

When 43 books were checked out on Wednesday, Suzy remained with 98 - 43 = 55 books. After 23 books were returned on Thursday, she ended with 55 + 23 = 78 books. However, 5 books were checked out on the same day meaning that 78 - 5 = 73 books were left. After 7 books were returned on Friday, Suzy had 73 + 7 = 80 books.
The answer: 80
Reverse engineering the question: When Suzy the librarian sat at her desk on Wednesday morning, she had 98 books ready for checkout. The same day, 43 books were checked out. The following day, 23 books were returned, but 5 books were checked out. On Friday, 7 books were returned. How many books did Suzy have?

For 6 months of the year he cuts his yard 15 days per month so he cuts his yard 6 * 15 = 90 times. For the remaining 6 months of the year, he cuts his yard three times a month so he cuts his yard 6 * 3 = 18 times. He cuts his yard 90 times for part of the year and 18 times for the rest of the year for a total of 90 + 18 = 108 times. There are 12 months in a year and he cuts his yard 108 times so he averages 108 / 12 = 9 times per month.
The answer: 9
Reverse engineering the question: Mr. Roper cuts his lawn 15 days a month beginning in April and ending in September. From October to the end of March he cuts his lawn three times a month. What is the average number of times that Mr. Roper cuts his yard per month?

Jenny spent 1 - 3 / 7 = 4 / 7 of her money. Since 4 / 7 is equal to $24, then 1 / 7 is equal to $24 / 4 = $6. So, Jenny originally had $6 x 7 = $42. Therefore, half of her original amount of money is $42 / 2 = $21.
The answer: 21
Reverse engineering the question:
Jenny had $24 left after spending 3/7 of her money. How much is half of her original amount of money?