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Arrange three $1$s, three $2$s and three $3$s in this square so that every row, column and diagonal adds to the same total.
You might like to use this interactivity to do this problem.
These two group activities use mathematical reasoning - one is numerical, one geometric.
An investigation involving adding and subtracting sets of consecutive numbers. Lots to find out, lots to explore.
EWWNP means Exploring Wild and Wonderful Number Patterns Created by Yourself! Investigate what happens if we create number patterns using some simple rules.