Number Chain · Sum Chain Number Game
Number Chain is a quick mental math game: drag through touching digits so they add up exactly to the target sum. Valid chains vanish and the column refills, while the timer bar drains faster the longer you play.
How to play Number Chain
- Drag across touching digits, diagonals included.
- Let go when the chain adds up to the target.
- Each correct chain scores and refills the timer bar.
Controls
Drag across the digits — or arrows + Space to pick, Enter to submit.
Tips & tricks
- Long chains of small digits are worth far more than two big ones.
- Drag back over the previous cell to undo the last step.
Number Chain is free to play online in your browser on phone, tablet and computer — no download, no sign-up. Your best score and trophies are saved automatically.