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Gears
Thanks Mechanical

gears
The mechanism above has four gears.
The red numbers inside each gear (90, 30, 10, 5) represent the number of teeth in each gear.

In the big gear (90 teeth), a hand turns with the gear.
The hand points to 12.
Question:
Once the gear with 30 teeth has made one complete clockwise revolution, where will the hand point?

See answer


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