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Simon Harris
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Comments by "Simon Harris" (@simonharris4873) on "The SAT Question Everyone Got Wrong" video.
I did it a slightly different way. Imagine the 2 centres of the circles are fixed, and the circles rotate like gears. Rotate circle B once counter clockwise. Circle A will rotate 3 times clockwise, as it's 1/3 the size. Now unpin the circles' centres, and lock the 2 together, so they no longer move with respect to each other. As we rotated circle B once counter clockwise, we need to rotate the entire system once clockwise to compensate and make the total rotations for circle B equal to 0. This rotates circle A clockwise one more time, for a total of 4.
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