Q: Peter is eating chips. Each chip is 10 calories. A bag has 24 chips and costs $2. If he wants to eat 480 calories, how much does he have to spend on chips?
A: Each bag has 240 calories because 24 x 10 = 240. He needs two bags because 480 / 240 = 2. It will cost $4 because 2 x 2 = 4. The answer is 4.

Q: Barney can perform 45 sit-ups in one minute. Carrie can do twice as many sit-ups per minute as Barney can. And Jerrie can do 5 more sit-ups per minute than Carrie can do. If Barney does sit-ups for 1 minute, and Carrie does sit-ups for two minutes, and Jerrie does sit-ups for three minutes, what would be the combined total number of sit-ups performed?
A: Carrie can do 2 * 45 = 90 sit - ups per minute. Jerrie can do 90 + 5 = 95 sit - ups per minute. In two minutes, Carrie would perform 90 * 2 - 180 sit - ups. And in three minutes, Jerrie would perform 3 * 95 = 285 sit - ups. Thus, in the scenario described, in total, the three would perform 45 + 180 + 285 = 510 sit - ups. The answer is 510.

Q: A camping site recorded a total of 150 campers for the past three weeks. Two weeks ago, there were 40 campers which was 10 more than the number of campers three weeks ago. How many campers were there last week?
A:
Three weeks ago, there were 40 - 10 = 30 campers. The total number of campers from three to two weeks ago is 30 + 40 = 70. Hence, there were 150 - 70 = 80 campers last week. The answer is 80.