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?
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 is 825.

Question: There are 45 children in a classroom. One-third of them are girls. How many boys are in the classroom?
Answer: One - third of all the kids are girls, which means 1 / 3 * 45 = 15 children. So there are 45 - 15 = 30 boys in the classroom. The answer is 30.

Question: Vicky has an excellent internet connection. She can download up to 50 MB/second. She has to download a new program to finish a college assignment. The program’s size is 360GB. If the internet connection is at maximum speed, how many hours does she have to wait until the program is fully downloaded? (There are 1000 MB per GB.)
Answer: We have to know how many MB are 360GB, 360GB x 1,000MB / 1GB = 360,000 MB. The total seconds downloading will be 360,000MB ÷ 50MB / second = 7,200 seconds. So she has to wait 7,200 seconds ÷ 3,600 seconds / 1 hour = 2 hours. The answer is 2.

Question: To get the printer to work, Jerry needs to add a black-and-white cartridge and three color cartridges. If each color cartridge costs $32 and each black-and-white cartridge costs $27, how much does he pay total?
Answer:
First find the total cost of the color cartridges: $32 / cartridge * 3 cartridges = $96. Then add the cost of the black - and - white cartridge to find the total cost: $96 + $27 = $123. The answer is 123.