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  Number & Math Play

Wrap It Up
Q You have 100 yards of ribbon on a spool, and you need 100 lengths of ribbon 1 yard long. It takes you 1 second to measure and cut each yard. How long will it take you to come up with the 100 pieces of ribbon?

A It will take you 99 seconds. Each cut, including the 99th, produces two pieces of ribbon.

Source: Carter & Russell,Classic Brain Puzzlers,p. 80