Question

1- Find the common factors of:
(a) 20 and 28
(b) 15 and 25​

Answer 1

Step-by-step explanation:

a)20=2×2×5

28=2×2×7

ans.4

b)15=3×5

25=5×5

ans.5

Answer 2

:

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Factors of 20=1,2,4,5,10,20

Factors of 28=1,2,4,7,14,28

Common factors =1,2,4.