Math Playground
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Colourable number chart

100 numbers in a 10×10 grid. Click cells to colour them and see patterns appear.

Colourable number chart

Click any cell to colour it. Or pick a pattern below.

Things to try

  • Colour every multiple of 5. They make two clean columns.
  • Colour the primes. The pattern thins out as numbers grow.
  • Colour the evens, then the odds — every cell ends up coloured exactly once.