Question: Dan has two times as many stickers as Tom. Tom has 3 times as many stickers as Bob. If Bob has 12 stickers, how many does Dan have?
Answer with step-by-step thinking: Tom has 3 * 12 = 36 stickers. Dan has 2 * 36 = 72 stickers.
So the answer is 72.


Question: Anna, Alison, and Jeff collect stamps. Anna had 37 stamps in her collection, Alison had 28 stamps in her collection, and Jeff had 31 stamps in his collection. Alison gave Anna half of her collection in exchange for a novel, and then Anna traded Jeff two bluebird stamps for one mountain stamp. How many stamps did Anna have in the end?
Answer with step-by-step thinking: Alison gave Anna 1 / 2 * 28 = 28 / 2 = 14 stamps. Adding Alison’s stamps to Anna’s collection means Anna has 14 + 37 = 51 stamps. Then Anna traded Jeff 2 stamps, so she had 51 - 2 = 49 stamps. Anna got 1 stamp back in the trade, so she had 49 + 1 = 50 stamps in the end.
So the answer is 50.


Question: A wheel on a certain machine makes 6 turns every 30 seconds. How many turns does it make in two hours?
Answer with step-by-step thinking:
Since there are 60 seconds in 1 minute, then there are 60 / 30 = 2 sets of 30 seconds in a minute. So a wheel makes 6 x 2 = 12 turns in 1 minute. Since there are 60 minutes in 1 hour, then a wheel makes 12 x 60 = 720 turns in an hour. Therefore, the wheel makes 720 x 2 = 1440 turns in 2 hours.
So the answer is 1440.