The difference in writing speed is 10 words / minute - 7 words / minute = 3 words / minute. Matt can write 3 words / minute x 5 minutes = 15 more words with his right hand.
The answer: 15
Reverse engineering the question: Matt can write 10 words a minute with his right hand and 7 words a minute with his left hand. How many words would Matt write in 5 minutes with his right hand than with his left?


Reasoning and answer: After using the coupon, the final price comes to 67 - 4 = 63 dollars. With three people, they each need to pay 63 / 3 = 21 dollars each.
The answer: 21
What was the question?
Question: Sarah, Mary, and Tuan decided to go to the restaurant for a meal. They decided to split the cost of the meal evenly. If the total price of the meal comes to $67 and they have a coupon for $4, how much does each person need to contribute to the bill?


In the first stretch he drove 80 miles / hour x 6 hours = 480 miles. In the second stretch he drove 60 miles / hour x 4 hours = 240 miles. After the gas station he drove 40 miles / hour x 2 hours = 80 miles. In total he drove 480 miles + 240 miles + 80 miles = 800 miles.
The answer: 800
Reverse engineering the question: Jeff was driving to the capital city to attend a conference. At first, he was driving at 80 miles/hour for about 6 hours, then the speed limit changed and he had to slow down to 60 miles/hour, and so he drove at this speed for 4 hours. Then he made a stop at a gas station. Once the car was full of gas, he drove at 40 miles/hour the rest of the trip for 2 hours. How many miles did he travel?


Reasoning and answer: If Sophia ate 1 / 6 of the pie, then 6 / 6 - 1 / 6 = 5 / 6 is left in the fridge. Let x be the pie's original weight. The current weight of the pie can be described by 5x / 6 = 1200 grams. So, 5x = 7200. And, the original weight is x = 1440 grams. So, Sophia ate 1440 grams original - 1200 grams after = 240 grams of pie.
The answer: 240
What was the question?
Question: Sophia ate 1/6 of her pie and she put the rest on the fridge. If the pie left in the fridge weighs 1200 grams, how many grams did Sophia eat?


In six years, Ellen will be 10 + 6 = 16 years old. If Martha is twice Ellen's age in six years, she is 2 * 16 = 32 years.
The answer: 32
Reverse engineering the question: Martha met Ellen in the grocery store alone and asked her age. Martha realized she was twice as old as Ellen will be in six years. If Ellen is 10 years old now, calculate Martha's age now.


Ursula's boss want's the commercial to be 30 / 100 * 30 = 9 seconds shorter. After Ursula makes the desired changes, the ad is going to be 30 - 9 = 21 seconds long.
The answer: 21
Reverse engineering the question:
Ursula is working at a marketing firm. She created a 30-second long commercial. Her boss told her that this commercial is too long to air and told her to shorten the commercial by 30%. How long will this commercial be after Ursula makes the desired changes?