Dan Anderson pointed out this great puzzler from Tom and Ray Magliozzi, or Click and Clack, the Tappit Brothers from Car Talk.[br]Original puzzle page: [url=http://www.cartalk.com/content/painting-carousel-0]http://www.cartalk.com/content/painting-carousel-0[/url][br][br]The problem is on the first slide, an exploration on the second and a diagram of the Merry Go Round in the puzzle on the last.[br][br]This copy is a modification of John Golden's adaptation at [url=https://www.geogebra.org/material/show/id/224259]https://www.geogebra.org/material/show/id/224259[/url][br]The minor modification involve changing to a two panels view, and instead of a slider, forward and backward buttons to control the changing scene is used.

More GeoGebra at [url]bit.ly/mh-ggb[/url]