Magic squares

The very simplest forms of magic squares and some ideas on how to turn them into colour patterns.

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Addition and subtraction related to the six digits shown.

An easy version of the game of Nim. Great for logical thinking and you can always win (if you know what you are doing!)

How many counters can you place on the grid without getting 3 in a row?

Fill in the puzzle so that every row, column and diagonal contains the numbers 1 to 4.