Aisha starts with 500 songs + 500 songs = 1000 songs added to her mp3 player in the first two weeks. After that Aisha adds twice that amount to her mp3 player, 1000 x 2 = 2000 songs added. She now has 1000 + 2000 = 3000 songs on her mp3 player. However, she decides she wants to remove 50 of them, 3000 - 50 = 2950 songs on her mp3 player.
The answer: 2950
Reverse engineering the question: Aisha enjoys listening to music on her mp3 player. She starts with 500 songs on her mp3 player, then adds another 500 the week after that. She realizes her mp3 player has a large capacity for storing songs so she adds twice the amount she already had on her mp3 player. After a while, though, she decides that she doesn't like 50 of the songs and removes them. How many songs are on Aisha's mp3 player now?

First Day:4 inches. Second Day: 5(4) = 20 inches. Third Day: (4 + 20) - 6 = 18 inches.
The answer: 18
Reverse engineering the question: Tropical Storm Sally brings 3 days of rain to southern Texas. The first day it rained 4 inches. The second day it rained 5 times as much as the first day, and the third day it rained 6 inches less than the sum of the first two days. How much did it rain on the third day?

The total number of tickets needed is 5 tickets + 4 tickets + 4 tickets = 13 tickets. Jeanne needs 13 tickets - 5 tickets = 8 tickets.
The answer: 8
Reverse engineering the question: Jeanne wants to ride the Ferris wheel, the roller coaster, and the bumper cars. The Ferris wheel costs 5 tickets, the roller coaster costs 4 tickets and the bumper cars cost 4 tickets. Jeanne has 5 tickets. How many more tickets should Jeanne buy?

One chair costs $140 x 1 / 7 = $20. Four chairs cost $20 x 4 = $80. So a table and 4 chairs cost $140 + $80 = $220.
The answer: 220
Reverse engineering the question:
A chair costs 1/7 of the cost of a table. If a table costs $140, how much will it cost to buy a table and 4 chairs?