A whole pea patch is 5 * 6 = 30 square feet. A radish patch is 30 / 2 = 15 square feet.
The answer: 15
Reverse engineering the question: A pea patch is twice as big as a radish patch. If one sixth of the pea patch is 5 square feet. How much is a whole radish patch in square feet?
Reasoning and answer: Matt is 11 x 4 = 44 years old now. In 2 years, Matt will be 44 + 2 = 46 years old. In 2 years, Fem will be 11 + 2 = 13 years old. So, the sum of their ages in two years is 46 + 13 = 59 years old.
The answer: 59
What was the question?
Question: Matt is four times as old as Fem. Currently, Fem is 11 years old. In two years, what is the sum of the ages of Matt and Fem?
After the first mission, the number of cats remaining on the island was 1800 - 600 = 1200. If half of the remaining cats on the island were relocated to a rescue center inland, the number of cats taken by the wildlife service on the second mission is 1200 / 2 = 600 cats. The number of cats remaining on the island is 1200 - 600 = 600.
The answer: 600
Reverse engineering the question: After complaints from the residents of Tatoosh about the number of cats on the island, the wildlife service carried out a relocation mission that saw the number of cats on the island drastically reduced. On the first relocation mission, 600 cats were relocated from the island to a neighboring island. On the second mission, half of the remaining cats were relocated to a rescue center inland. If the number of cats originally on the island was 1800, how many cats remained on the island after the rescue mission?
Reasoning and answer: The cost of the dolls is 3 $1 = $3. Amy has $100 $3 = $97 left.
The answer: 97
What was the question?
Question: Amy's grandfather gave her $100 for her birthday. Amy bought 3 dolls, each of which cost $1. How much money does Amy have left?
Since Kenneth spent 10%, then he is left with 100% - 10% = 90% of his earnings. Since 90% of his earnings is worth $405, then 1% of his earnings is $405 / 90 = $4.50. Hence, Kenneth's earnings is $4.50 x 100 = $450.
The answer: 450
Reverse engineering the question: Kenneth spent 10% of this earnings this week on a new joystick. If he is left with $405, how much were his earnings?
Jenny needs to print 7 * 25 = 175 pages. This will cost 175 * $.10 = $17.5. The pens will cost 7 * $1.50 = $10.50. In total, she will spend $17.5 + $10.5 = $28. Since she pays with 2 twenty dollar bills she pays with 2 * 20 = 40 dollars. Thus, she will get $40 - $28 = $12 in change.
The answer: 12
Reverse engineering the question:
It costs $.10 to print one page. Jenny wants to print 7 copies of her 25-page essay. She also wants to buy 7 pens that each cost $1.50. If she pays the store with 2 twenty dollar bills, how much money should she get in change?