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Tue 22 Feb, 2005 10:35 am
You have three connecting gear wheels with 15, 9, and 25 teeth respectively. They start turning.
How many turns make each of the three axels before the three gear wheels all are back in the original starting position?
Laura
the smallest common multiple is 225.
The first one makes 225/15 = 15 turns
The second makes 225/9 = 25 turns
The third one makes 225/25 = 9 turns.
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