Saturday, January 21, 2012

Pinion Puzzle [Easy 1]

If pinion A rotates six times how many times will pinion C rotate?

Pinion Puzzle
Scroll down to see the answer!




































































Answer:

10.

A has 20 teeth and B has 10. So B rotates 12 times. As C has 12 teeth, B has 10 teeth, and B rotates 12 times, C will rotate 10 times: 12 * 10 = 10 * 12.

Or, simply:

6 * 20 = 120
120 / 12 = 10

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