MathterRiddler on Horizon: "Puzzle from the Mathter website: https://mathter.islands.co.il/en/questions/15 "

No JavaScript? That's cool, but you'll need to disable Turbo mode as it uses JavaScript in the client.

MathterRiddler @MathterRiddler

Puzzle from the Mathter website: mathter.islands.co.il/en/questions/15 #Puzzle #Arithmetic #ConstructinganExampleCounterexample

5:00 PM · Mar 21, 2026