She had 4 * 12 = 48 shirts to start with. She gives away 48 / 3 = 16. So she has 48 - 16 = 32 left.
The answer: 32
Reverse engineering the question: Kim has 4 dozen shirts. She lets her sister have 1/3 of them. How many shirts does she have left?


Reasoning and answer: There are a total of 9 + 10 + 11 = 30 kindergartners. Altogether, they bring a total of 30 x 40 = 1200 tissues.
The answer: 1200
What was the question?
Question: The kindergartners each need to bring one mini tissue box to class for the school year. There are three kindergartner groups with 9, 10, and 11 students respectively. Each mini tissue box contains 40 tissues. How many tissues do the kindergartner groups bring together?


Hillary needs to read for 1 hour which equals 60 minutes. Hillary has read for a total of 16 minutes + 28 = 44 minutes so far. Hillary will need to read for 60 minutes - 44 = 16 minutes on Sunday.
The answer: 16
Reverse engineering the question: Hillary's teacher assigned 1 hour of reading during the weekend. On Friday night, Hillary read for 16 minutes. On Saturday she read for 28 minutes. How many minutes does Hillary have to read on Sunday to complete the assignment?


Reasoning and answer: Ernie has three times as many stamps as Peggy, or 3 * 75 = 225 stamps. Bert has 4 times as many stamps as Ernie, or 4 * 225 = 900 stamps. Thus, Peggy would need 900 - 75 = 825 more stamps to have a collection as large as Bert's.
The answer: 825
What was the question?
Question: Bert, Ernie, and Peggy collect stamps. Bert has four times as many stamps as Ernie, but Ernie has three times as many stamps as Peggy. If Peggy currently has 75 stamps in her collection, how many stamps does she need to add to her collection to have a collection as large as Bert's collection?


Athlete 2 ran the relay race for 55 + 10 = 65 seconds. Athlete 3 ran for 65 - 15 = 50 seconds. While athlete 4 finished the relay race for 55 - 25 = 30 seconds. So,It take them 55 + 65 + 50 + 30 = 200 seconds to they finish the relay race.
The answer: 200
Reverse engineering the question: Four athletes joined a relay race. Athlete 1 ran for 55 seconds, athlete 2 ran 10 seconds more than athlete 1, athlete 3 ran 15 seconds less than athlete 2, and athlete four finished it 25 seconds less than athlete 1. How long, in seconds, did it take them to finish the relay race?


The combined cost of everything was 2500 + 3500 + 2000 = $8000. So he gets an 8000 * .1 = $800 discount. That means he pays 8000 - 800 = $7200.
The answer: 7200
Reverse engineering the question:
James decides to buy a living room set. The coach cost $2500 and the sectional cost $3500 and everything else has a combined cost of $2000. He gets a 10% discount on everything. How much did he pay?