Factors and multiples

There are 243 NRICH Mathematical resources connected to Factors and multiples
Lots of Biscuits!
problem

Lots of Biscuits!

Age
5 to 7
Challenge level
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Help share out the biscuits the children have made.
Times Tables Shifts
problem

Times Tables Shifts

Age
7 to 11
Challenge level
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In this activity, the computer chooses a times table and shifts it. Can you work out the table and the shift each time?
Drawing Celtic Knots
problem

Drawing Celtic Knots

Age
11 to 14
Challenge level
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Here is a chance to create some Celtic knots and explore the mathematics behind them.
Three Dice
problem

Three Dice

Age
7 to 11
Challenge level
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Investigate the sum of the numbers on the top and bottom faces of a line of three dice. What do you notice?
Shifting Times Tables
problem

Shifting Times Tables

Age
11 to 14
Challenge level
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Can you find a way to identify times tables after they have been shifted up or down?
How much can we spend?
problem

How much can we spend?

Age
11 to 14
Challenge level
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A country has decided to have just two different coins, 3z and 5z coins. Which totals can be made? Is there a largest total that cannot be made? How do you know?
Multiples Sudoku
problem

Multiples Sudoku

Age
11 to 14
Challenge level
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Each clue in this Sudoku is the product of the two numbers in adjacent cells.
Power mad!
problem

Power mad!

Age
11 to 14
Challenge level
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Powers of numbers behave in surprising ways. Take a look at some of these and try to explain why they are true.
LCM Sudoku II
problem

LCM Sudoku II

Age
11 to 18
Challenge level
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You are given the Lowest Common Multiples of sets of digits. Find the digits and then solve the Sudoku.
Venn diagrams
problem

Venn diagrams

Age
5 to 11
Challenge level
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How will you complete these interactive Venn diagrams?