Puzzle 1: You are given nine gold coins that look identical. You are told that one of them is fake, and that this coin weighs ...

This holiday-themed brainteaser looks simple, but it's quietly tripping up adults everywhere. A math teacher walks us through ...

Calculating Frosty’s weight with fragments of high school geometry. The post Math Puzzle for December 26, 2025 appeared first on Alameda Post.