This practical challenge invites you to investigate the different
squares you can make on a square geoboard or pegboard.
This activity investigates how you might make squares and pentominoes from Polydron.
If you had 36 cubes, what different cuboids could you make?
Here is a table containing all the letters of the alphabet:
It has six rows (going from left to right) and five columns
(going from top to bottom). The Vikings communicated in writing by
making simple scratches on wood or stones called runes. Sometimes
they were written in a secret or coded way. Here is 'was' written
in NRICH's coded runes:
Can you work out how the code works using the table of the
Here is a message in secret runes:
Can you decipher it?
Perhaps you can make up your own message.