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Two Dice

Find all the numbers that can be made by adding the dots on two dice.

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Biscuit Decorations

Andrew decorated 20 biscuits to take to a party. He lined them up and put icing on every second biscuit and different decorations on other biscuits. How many biscuits weren't decorated?

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Writing Digits

Lee was writing all the counting numbers from 1 to 20. She stopped for a rest after writing seventeen digits. What was the last number she wrote?

One Big Triangle

Age 5 to 7 Challenge Level:

Drag and drop these triangles so that the numbers that touch add up to $10$
Try to use all the small triangles and move them to fill in all the spaces in the big triangle.
 

Full screen version

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You can also print out these triangles, cut them out and rearrange them to make the big triangle.

Here is a printable version with 10 frames.


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.