← Balance Scales
How Balance Scales works

Balance Scales

Find what every shape weighs so that all the scales balance.

Interactive lesson1 / 5
Rule 01

Same shape, same weight.

Shapes that look the same weigh the same, wherever they sit. Two different shapes may still share a weight. A number block on a pan weighs exactly its number.

All rules
Rule 01Same shape, same weight.

Shapes that look the same weigh the same, wherever they sit. Two different shapes may still share a weight. A number block on a pan weighs exactly its number.

Rule 02Weights are 1 to 9.

Every shape weighs a whole number from 1 to 9. Pick a shape, then its weight on the pad.

Rule 03A scale tips when it’s wrong.

A scale stays level until every shape on it has a weight. Then it either balances or tips toward the heavier side.

Rule 04Every day has exactly one answer.

Every weight can be worked out from the scales, with no guessing. Stuck? A hint shows a next step; in ranked play, each hint adds 15 s.

Tap a shape, then its weight on the pad · keyboard: arrows move between shapes, 1–9 set the weight, Backspace clears

Got it — play