# Hidden Numbers — Probability Puzzle | Mathallery

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

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# Hidden Numbers

Probability · 30 levels

Reveal a few cells, then find the matching line.

## How to play

- Drag on the silver foil to scratch a cell. You may only start as many cells as the ✦ stars allow.
- EXACT LINE cards: exactly one line (row, column or diagonal) makes the target. LIKELY LINE cards: pick the line most likely to make it.
- Tap a line's arrow tab, then CHECK. Scratched foil never grows back, so plan which cells to scratch.

The numbers under the foil are listed at the bottom of the card. If a row shows 8 and 1 and the target is 15, its hidden cell must be a 6.

[Open Hidden Numbers](https://mathallery.com/#/play/scratch/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.