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  Lateral Thinking

Time to Tell		  
Q A sundial is said to be the timepiece with the fewest moving parts. What is the timepiece with the most moving parts?


  
A An hourglass—filled with many grains of sand or other granular material.

Inspired by a puzzle in Mensa Presents Mighty Brain Teasers, R. Allen & J. Fulton. New York: Barnes and Noble, 1999.