Factors and multiples

There are 252 NRICH Mathematical resources connected to Factors and multiples

problem

Favourite

The moons of vuvv

Age

7 to 11

Challenge level

The planet of Vuvv has seven moons. Can you work out how long it is between each super-eclipse?

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Multiples grid

Age

7 to 11

Challenge level

What do the numbers shaded in blue on this hundred square have in common? What do you notice about the pink numbers? How about the shaded numbers in the other squares?

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Making sticks

Age

5 to 7

Challenge level

Kimie and Sebastian were making sticks from interlocking cubes and lining them up. Can they make their lines the same length? Can they make any other lines?

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Counting factors

Age

11 to 14

Challenge level

Is there an efficient way to work out how many factors a large number has?

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Mystery matrix

Age

7 to 11

Challenge level

Can you fill in this table square? The numbers 2 -12 were used to generate it with just one number used twice.

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Fitted

Age

7 to 11

Challenge level

Nine squares with side lengths 1, 4, 7, 8, 9, 10, 14, 15, and 18 cm can be fitted together to form a rectangle. What are the dimensions of the rectangle?

problem

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Share bears

Age

5 to 7

Challenge level

Yasmin and Zach have some bears to share. Which numbers of bears can they share so that there are none left over?

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