article
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.
Factors and multiples
article
Public Key Cryptography
An introduction to coding and decoding messages and the maths behind how to secretly share information.
problem
Are you well Balanced?
Age
5 to 7
Challenge level
Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
problem
Rearranged Rectangle
Age
7 to 11
Challenge level
How many different rectangles can you make using this set of rods?
problem
Neighbourly Addition
Age
7 to 14
Challenge level
I added together some of my neighbours' house numbers. Can you explain the patterns I noticed?
problem
Surprising Split
Age
7 to 11
Challenge level
Does this 'trick' for calculating multiples of 11 always work? Why or why not?
problem
Tables Teaser
Age
5 to 7
Challenge level
How will you work out which numbers have been used to create this multiplication square?
problem
Gabriel's Problem
Age
11 to 14
Challenge level
Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
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Being Collaborative - Primary Number
Age
5 to 11
Challenge level
Number problems at primary level to work on with others.