Q. Find the common factors of:
(a) 8, 20           (b) 9, 15

Answers (1)

The common factors of the following are:
(a) 8, 20           

8 = 2\times2\times2\times2

20 = 2\times2\times5

Hence, the common factors are 1, 2\ and\ (2\times2 = )4

(b) 9, 15

9 = 3\times3

15= 3\times5

Hence, the common factors are 1\ and\ 3

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