### Geoboards

This practical challenge invites you to investigate the different squares you can make on a square geoboard or pegboard.

### Polydron

This activity investigates how you might make squares and pentominoes from Polydron.

If you had 36 cubes, what different cuboids could you make?

# Eight Queens

##### Stage: 2 Challenge Level:

This is a famous problem: Place eight queens on a chessboard (an $8$ by $8$ grid) so that none can capture any of the others.

Remember that a queen can move any number of squares across, down or diagonally.

This is a good one to do outside with seven friends standing on an $8$ by $8$ grid!

Is there more than one solution?