Shane takes a total of 2 photos / day * 31 days = 62 photos in January. This means he must have taken 146 total photos 62 January photos = 84 photos in February. As he took an equal number each week, he must have taken 84 photos / 4 weeks = 21 photos each week.
The answer: 21
Reverse engineering the question: Shane wants to take as many photos as possible this year. He takes 146 photos in the first 2 months of the year. In January, he takes 2 photos every day. The rest of the photos were taken in February. If in February he took an equal number of photos each week, how many photos did Shane take each week in February?
Reasoning and answer: 2 students per computer means the total number of computers is 82 / 2 = 41 computers. with the arrival of 16 students, the number of computers that should be added is 16 / 2 = 8 computers. all computers together are 41 + 8 = 49 computers.
The answer: 49
What was the question?
Question: With 82 students, there are 2 students for each computer. If there are 16 more students, how many computers must they have in total to continue with 2 students per computer?
He gets 1000 * .1 = $100 a year. So after 3 years, he gets 100 * 3 = $300. So he has 300 + 1000 = $1300.
The answer: 1300
Reverse engineering the question: John invests in a bank and gets 10% simple interest. He invests $1000. How much money does he have after 3 years?
Reasoning and answer: Lola climbs 20 stories in 20 stories x 10 seconds / story = 200 seconds. Tara can go up the elevator in 8 seconds / story x 20 stories = 160 seconds without the stops at each floor. The elevator stops for 3 seconds on each floor for a total of 20 stories x 3 seconds / story = 60 seconds. In total it takes Tara 160 seconds + 60 seconds = 220 seconds to reach the top floor. Because 200 < 220 Lola wins.
The answer: 220
What was the question?
Question: Lola and Tara decide to race to the top of a 20 story building. Tara takes the elevator and Lola runs up the stairs. Lola can run up 1 story in 10 seconds. The elevator goes up a story in 8 seconds but stops for 3 seconds on every single floor. How long would it take for the slower one of Lola and Tara to reach the top floor?
Mrs. Fredrickson has 80 x 1 / 4 = 20 roosters. So he has 80 - 20 = 60 hens. Only 60 x 3 / 4 = 45 of the hens lay eggs. Thus, 60 - 45 = 15 hens do not lay eggs. Therefore, Mr. Fredrickson has a total of 15 hens + 20 roosters = 35 chickens that do not lay eggs.
The answer: 35
Reverse engineering the question: Mrs. Fredrickson has 80 chickens where 1/4 are roosters and the rest are hens. Only three-fourths of those hens lay eggs. How many chickens does Mr. Fredrickson have that do not lay eggs?
Steven has 3 x 30 = 90 stickers. And, Terry has 90 + 20 = 110 stickers. Therefore, they have 30 + 90 + 110 = 230 stickers altogether.
The answer: 230
Reverse engineering the question:
Ryan has 30 stickers. Steven has thrice as many stickers as Ryan. Terry has 20 more stickers than Steven. How many stickers do they have altogether?