DAY 272
An athlete can run 10 miles at 10 miles per hour with the wind at his back. On the return, as he runs into the wind, he can only go 5 miles per hour. What is his average speed for the round trip?

Answer:

6.67 miles per hour............He runs 20 miles in 3 hours.

DAY 271
A man went on a five-day fishing trip. He caught 3 fish more each day than he did the day before, for a total of 30 fish over the five days. How many fish did he catch the first day?

Answer:

He didn't catch any fish the first day. He caught 3 on the second day, 6 on the third day, 9 on the fourth day, and 12 on the fifth day. Let x = the number of fish he caught on the first day............ x + (x + 3) + (x + 6) + (x + 9) + (x + 12) = 30

DAY 270

A man selling bread sells half of what he has plus half a loaf to his first customer. He sells half of what remains plus half a loaf to his second customer. He sells half of what is left plus half a loaf to his third and last customer, and has no bread left. He never has to cut a loaf of bread. How many loaves did the man have to start with?

Answer:

7 loaves...........3 1/2 + 1/2 = 4.........leaving 3..........1 1/2 + 1/2 = 2...........leaving 1.........1/2 + 1/2 = 1