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a mechanical toy on a circular track goes foward 3in. then back 2in. how many moves does the toy take to complete one 15in. revolution?

i got 15 moves but i just want to make sure i did it right.

  • math -

    No, 25 is the answer. After 24 forward and back pairs (which count as two moves per pair), the toy has moved 12 inches. In the next forward motion it gets to 15 inches.

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