Kakuro

A cross-sums crossword with numbers: fill each run of white cells with distinct digits 1–9 that add up to the clue at its start — the number above-right for the row, below-left for the column. Pure arithmetic deduction. Fewer seconds is better.

Trains: Arithmetic logic · Category: Logic & Puzzles

How to play: Kakuro is a free, browser-based brain-training game in the Brain Gym suite. Play it instantly — no sign-up, works offline, and your best scores are saved on your device.

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