The Ladder Problem

Simon saw this thumbnail (by the channel Mind Your Decisions) among the YouTube recommended videos and sat down to solve it, without watching the video, so that he doesn’t see … Continue reading The Ladder Problem

Simon’s Spirograph

Simon saw a way to draw epitrochoids (gear rolling outside another gear) and hypotrochoids (gear rolling inside another gear) on VSauce: two equal circles rolling around each other form a … Continue reading Simon’s Spirograph