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

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Eight Dominoes

Using the 8 dominoes make a square where each of the columns and rows adds up to 8

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Prime Magic

Place the numbers 1, 2, 3,..., 9 one on each square of a 3 by 3 grid so that all the rows and columns add up to a prime number. How many different solutions can you find?

Coordinate Challenge

Stage: 2 Challenge Level: Challenge Level:1

It might help to read through each clue in turn and make a note of which letters could be at those positions.
If you're not able to use the interactivity, how about printing out this sheet and then cutting out the letters so you can move them around the grid?
What different types of symmetry do you know about? Which letter is the only one not to have any symmetry at all? How does that help you?