Year 6 -Identify common factors, common multiples, prime numbers

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Watch this short video about multiples and factors

Shereen puts numbers up to 72 in the venn diagram . Tick the numbers which would go in the middle.

3 points

Which numbers are common factors of 12 and 30?

2 points

3 points

The lowest common multiple of 5 and 7 is 35. What is the lowest common multiple of 6 and 9?

1 point

Clear selection

Tick the calculations that are the same as 13 x 9. (Taken from ISeeReasoning - Gareth Metcalfe)

2 points

11 x 11

99 +18

130 - 9

39 x 3

Jack made cookies for a bake sale. He made 345 cookies. The recipe says that he should have 17 raisins in each cookie. How many raisins did he use altogether?

1 point

586

3450

2415

5865

Clear selection

Multiple: the multiples of a number are the numbers you get when you add a number to itself repeatedly. Common Multiple: A common multiple is a number that is a multiple of two or more numbers; in other words, it is a common multiple of all those numbers. What is the lowest common multiple of 8 and 12?

1 point

Clear selection

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