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Learn various numeric systems (from base 2 to base 9) and have fun along the way.

Spin. Spell. Win.

How many words can you create from 6 letters?

Solve each puzzle by swapping exactly two cards. You get only one swap per task.

Count the cubes to practice arithmetic in context. Can you get 300 points?

Put that brain to the test

Bring them all to zero.

Flip cards, match pairs, and relive pure 8‑bit nostalgia on the Commodore 64!