With an odd number of gears, do the first and last gears rotate in the same direction?

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Multiple Choice

With an odd number of gears, do the first and last gears rotate in the same direction?

Explanation:
Gears transfer motion by meshing, and each meshing reverses the direction of rotation. In a chain of gears, you flip direction once at every contact. With an odd number of gears, there are an odd number of reversals, so the last gear ends up turning in the same direction as the first. For example, first gear clockwise, second gear counterclockwise, third gear clockwise, and so on. If there were an even number of gears, the last gear would rotate opposite to the first. So with an odd number, the first and last gears rotate in the same direction.

Gears transfer motion by meshing, and each meshing reverses the direction of rotation. In a chain of gears, you flip direction once at every contact. With an odd number of gears, there are an odd number of reversals, so the last gear ends up turning in the same direction as the first. For example, first gear clockwise, second gear counterclockwise, third gear clockwise, and so on. If there were an even number of gears, the last gear would rotate opposite to the first. So with an odd number, the first and last gears rotate in the same direction.

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