Question

find the common factor of 20 and 28 15 and 25 35 and 50 56 and 120​

Answer 1

(i) 20 and 28

factors of 20: 1,2,4,5,10,20

factors of 28: 1,2,4,7,14, 28

common factors=1,2,4.

ii) 15 and 25

Factors of 15: 1,3,5,15

factors of 25: 1,5,25

common factors=1,5

iii) 35 and 50

factors of 35: 1,5,7,35

factors of 50: 1,2,5,10,25, 50

common factors=1,5

iv) 56 and 120

factors of 56: 1,2,4,5,10,20

factors of 120: 1,2,4,7,14, 28

common factors=1,2,4.

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