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Month Mania

Can you design a new shape for the twenty-eight squares and arrange the numbers in a logical way? What patterns do you notice?

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Doodles

Draw a 'doodle' - a closed intersecting curve drawn without taking pencil from paper. What can you prove about the intersections?

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Euler's Officers

How many different ways can you arrange the officers in a square?

Diagonal Sums Sudoku

Stage: 2, 3 and 4 Challenge Level: Challenge Level:1

5 1 3 9 6 2 7 8 4
4 8 6 7 3 5 1 2 9
7 2 9 8 1 4 6 3 5
8 6 5 2 7 9 3 4 1
1 7 4 6 5 3 2 9 8
3 9 2 1 4 8 5 6 7
9 5 8 3 2 7 4 1 6
2 4 1 5 8 6 9 7 3
6 3 7 4 9 1 8 5 2