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  Number and Math Play

Minus Two
Q How many times can you subtract the number 2 from the number 32?
A Once. After you subtract 2 from 32, you subtract 2 from 30, from 28, and so on.
Source: Inspired by a puzzle in Mensa Presents Mighty Brain Teasers, R. Allen & J. Fulton. New York: Barnes and Noble, 1999.