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Factors of 40: 1,2,4,5,8,10,20,40

1 x 40

2 x 20

4 x 10

5 x 8

Factors of 30: 1,2,3,5,6,10,15,30

1 x 30

2 x 15

3 x 10

5 x 6

Common factors: 1, 2 5, 10

10 is the highest common factor.

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15y ago

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