Jacob has 28 - 2 = 26 crayons. You can find the total number of crayons by adding the number of crayons each person has: 26 crayons + 62 crayons + 28 crayons = 116 crayons.
The answer: 116
Reverse engineering the question: Wanda has 62 crayons. Dina has 28 and Jacob has two fewer crayons than Dina. How many crayons do they have in total?

First find the time it takes Jill to run up the hill: 900 feet / 9 feet / second = 100 seconds. Then find the time it takes Jill to run down the hill: 900 feet / 12 feet / second = 75 seconds. Then add the two times to find Jill's total time: 100 seconds + 75 seconds = 175 seconds.
The answer: 175
Reverse engineering the question: Jill can run up a hill at 9 feet/second and down a hill at 12 feet/second. How long does it take her to run up and down a 900 foot hill?

Jace drives a total of 4 + 9 = 13 hours. Jace will travel 60 * 13 = 780 miles.
The answer: 780
Reverse engineering the question: Jace drives 60 miles per hour. If Jace drives for 4 hours straight, take a 30-minute break, and then drives for another 9 hours straight, how many miles will he travel?

John runs at 6 miles per hour for 0.5 hours, for a distance of 6 * 0.5 = 3 miles. Then John runs at 4 miles per hour for 0.5 hours, for a distance of 4 * 0.5 = 2 miles. In total, John runs 3 + 2 = 5 miles.
The answer: 5
Reverse engineering the question:
John jogs at a speed of 4 miles per hour when he runs alone, but runs at 6 miles per hour when he is being dragged by his 100-pound German Shepherd dog. If John and his dog go on a run together for 30 minutes, and then John runs for an additional 30 minutes by himself, how far will John have traveled?