Fencepost Error Math Riddle: The Ticking Clocks Problem

An antique grandfather clock in a beautiful parlor.

Train Your Brain to Spot Hidden Intervals in Math, Physics, and Logic Puzzles This week’s puzzle explores a fundamental mathematical concept known as the fencepost error (or interval counting). In mathematics and standardized test prep, students often default to simple proportional thinking — assuming that if 6 items take 6 seconds, then 12 items must […]