Digit Lab
Place value · 30 levels
Arrange the digits and discover the best result.
How to play
- Tap a digit ball, then a digit slot to drop it in. Tap a filled slot to take its ball back.
- × machines need the biggest product. − machines need the smallest difference.
- Filling every digit slot checks your result. The machine says if a better arrangement exists. From level 12 checks are limited!
Big digits belong in big places, but which number gets the biggest digit? In 2-digit × 2-digit, 96 × 87 beats 97 × 86. For a small difference, make the front digits close, then fight with the rest. No number may start with 0.
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.