Twitter-Length Tasks – Whole Number Tic-Tac-Toe

Twitter-Length Tasks can be quickly and simply explained, yet allow for extensive exploration.

Fill in each square in a tic-tac-toe board with a different number between 0 and 5.


That means at least some of the squares will have decimals or fractions.


Try to make as many rows and columns as possible add up to whole numbers.


  • Try using numbers between 0 and 1.
  • Try a 4 x 4 grid instead of a 3 x 3 grid.

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