NPR Puzzles

The following puzzles were used as the puzzle of the week on NPR Sunday Morning Edition.

1. (week of October 10, 2002)

Place some + signs and some × signs inside the digits 1 2 3 4 5 6 7 8 9 so that the result of the arithmetic is 2002.

2. (week of July 3, 2005)

A country mints 3 denominations of coins, in whole numbers of centos. It takes 3 of these coins to make 20 centos, or 23 centos, or 29 centos. What are the denominations of coins?

Click here for the answers.