# Stepping Stones — Adding up Puzzle | Mathallery

Source: https://mathallery.com/games/stones/

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# Stepping Stones

Adding up · 30 levels

Place 2, 3, 4… where the touching stones add up.

## How to play

- Tap an empty square to place the next stone: 2, then 3, then 4…
- A stone may only go where the stones touching it (all 8 around, diagonals too) add up to exactly its number.
- Reach the ⭐ number. From level 14 you place one 1-stone yourself first, anywhere.

Two squares may both add up to 6, but only one keeps the chain going. Look ahead, and Undo freely. Rocks count as 0.

[Open Stepping Stones](https://mathallery.com/#/play/stones/1)

Teeter, Tint and Echo Heist are free starters. Other games unlock through earned game choices or permanent packs. Your progress stays in the browser; optional sign-in saves it to your website account.