Half the number in Mrs. Finley's class is 24 / 2 = 12. Mr. Johnson has 12 + 10 = 22 students.
The answer: 22
Reverse engineering the question: Mrs. Finley's class has 24 students, and Mr. Johnson's class has 10 more than half the number in Mrs. Finley's class. How many students are in Mr. Johnson's class?

The total cost of all the pieces of furniture should be 134 * 150 = 20100 dollars. Sally's Woodworking LLC will reimburse Remy the difference between the total cost and the amount he paid, which is 20700 - 20100 = 600 dollars.
The answer: 600
Reverse engineering the question: On Friday, Remy paid Sally's Woodworking LLC a total of $20,700 for 150 pieces of furniture. Later that evening, the company's accountant discovered that a new intern in the sales department had overcharged Remy. If the cost of a piece of furniture is $134, how much money will Sally's Woodworking LLC reimburse Remy?

After Smith gave him $200, Randy had 3000 + 200 = 3200 dollars. The value of the rest of the money is 3200 - 1200 = 2000 dollars.
The answer: 2000
Reverse engineering the question: Randy had $3,000. Smith gave him another $200. Randy then gave Sally $1,200 and kept the rest. What was the value, in dollars, of the rest?

She uses 4 hours / day * 125 watts / hour = 500 watt hours / day. That means she uses 500 watt hours / day * 7 days / week = 3500 watt hours / week. This is 3500 watt hours / 1000 watts / kw = 3.5 kw hours. So her TV cost 3.5 kw hours / week * $0.14 / kw hour = $0.49 / week.
The answer: 49
Reverse engineering the question:
Kim's TV uses 125 watts of electricity per hour. She runs it for 4 hours a day. If electricity cost 14 cents per kw/h how many cents does her TV cost to run for a week?