Factors and multiples

There are 252 NRICH Mathematical resources connected to Factors and multiples

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Mathdoku demonstration

This video of Charlie and Liz solving a 6 by 6 Mathdoku may give you ideas for strategies to try.

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Playing with factors and multiples

This article for primary teachers outlines why developing an intuitive 'feel' for numbers matters, and how our activities focusing on factors and multiples can help.

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Public key cryptography

An introduction to coding and decoding messages and the maths behind how to secretly share information.

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Being collaborative - primary number

Age

5 to 11

Challenge level

Number problems at primary level to work on with others.

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Being resilient - primary number

Age

5 to 11

Challenge level

Number problems at primary level that may require resilience.

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Sums of squares and sums of cubes

An account of methods for finding whether or not a number can be written as the sum of two or more squares or as the sum of two or more cubes.

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Multiplication series: number arrays

This article for teachers describes how number arrays can be a useful representation for many number concepts.

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Can you find a perfect number?

Can you find any perfect numbers? Read this article to find out more...

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