Nice Easy Puzzle For Ya ............

Gizmonster | 14:15 Fri 31st Oct 2014 | ChatterBank

25 Answers

In the figure below, the radius of circle A is 2 units, the radius of circle B is 3 units.
Starting from the position shown in the figure, circle A rolls around circle B (circle B remains stationary).
At the end of how many revolutions of circle A, will the centre of circle A be back at its starting point ??

Link to image:

http://i264.photobucket.com/albums/ii200/Burnleymoonbeam/circles2_zpsa7f10d41.gif

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jim360

Best Answer

Ah -- changes the way I was looking at the question, which was in trying to get the lines aligned again (I think then 3 is still wrong, of course, by grasscarps' logic). So 1.5 + 1 = 2.5?

15:20 Fri 31st Oct 2014

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