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A square made of coloured triangles, squares and parallelograms.

problem

Square Tangram

7 to 11

This was a problem for our birthday website. Can you use four of these pieces to form a square? How about making a square with all five pieces?

article

Difficulties With Division

5 to 11

This article for teachers looks at how teachers can use problems from the NRICH site to help them teach division.

problem

Birds in the Garden

5 to 11

This activity asks you to collect information about the birds you see in the garden. Are there patterns in the data or do the birds seem to visit randomly?

problem

Vital?

16 to 18

Third challenge cipher

problem

Favourite

100 Square Jigsaw

5 to 7

Can you complete this jigsaw of the 100 square?

Multicoloured socks lying next to each other.

problem

Favourite

Mixed-Up Socks

5 to 7

Start with three pairs of socks. Now mix them up so that no mismatched pair is the same as another mismatched pair. Is there more than one way to do it?