This really boggled my mind! (algebra)

I disagree with the presenter's results. The question, as asked, was "At the end of how many revolutions will the center of Circle A reach its starting point?" The center of the circle actually has no bearing on the results, as the entire circle A will travel around circle B 3 times in order for circle A's center to return to the starting point. Therefore I call BS on the entire premise of the video, which was to make the presenter appear smarter than the test writers.