Factors and multiples

There are 252 NRICH Mathematical resources connected to Factors and multiples
Xavi's T-shirt
problem
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Xavi's t-shirt

Age
7 to 16
Challenge level
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How much can you read into a t-shirt?

What numbers can we make now?
problem
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What numbers can we make now?

Age
11 to 14
Challenge level
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Imagine we have four bags containing numbers from a sequence. What numbers can we make now?

5 by 5 Mathdokus
problem
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5 by 5 Mathdokus

Age
7 to 16
Challenge level
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Can you use the clues to complete these 5 by 5 Mathematical Sudokus?

4 by 4 Mathdokus
problem
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4 by 4 Mathdokus

Age
7 to 14
Challenge level
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Can you use the clues to complete these 4 by 4 Mathematical Sudokus?

Three neighbours
problem
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Three neighbours

Age
7 to 14
Challenge level
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Take three consecutive numbers and add them together. What do you notice?
Dicey Array
game
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Dicey array

Watch the video of this game being played. Can you work out the rules? Which dice totals are good to get, and why?

Are you well Balanced?
problem
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Are you well balanced?

Age
5 to 7
Challenge level
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Can you work out how to make each side of this balance equally balanced? You can put more than one weight on a hook.
Tables Teaser
problem
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Tables teaser

Age
5 to 7
Challenge level
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How will you work out which numbers have been used to create this multiplication square?
Gabriel's Problem
problem
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Gabriel's problem

Age
11 to 14
Challenge level
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Gabriel multiplied together some numbers and then erased them. Can you figure out where each number was?
Multiple Surprises
problem
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Multiple surprises

Age
11 to 16
Challenge level
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Sequences of multiples keep cropping up...