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Polydron

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

Eight Dominoes

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

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?

Symmetry Challenge

Age 7 to 11
Challenge Level

Systematically explore the range of symmetric designs that can be created by shading whole squares of the grid below.

You could use this sheet of blank grids to record your results, or simply squared paper.



Square grid formed from 9 smaller squares
How many can you find?


The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice.
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NRICH is part of the family of activities in the Millennium Mathematics Project.