Q. Find the HCF of the following:
(i) 24 and 36         (ii) 15, 25 and 30
(iii) 8 and 12         (iv) 12, 16 and 28

Answers (1)

(i) 24 and 36 

24 = 2 \times 2 \times 2 \times 3

36 = 2 \times 2\times 3 \times 3

HCF = 2 \times 2 \times 3 = 12

(ii) 15, 25 and 30

15 = 3 \times

25 = 5 \times

30 = 2 \times 3 \times 5

HCF = 5

(iii) 8 and 12 

8 = 2 \times 2 \times 2

12 = 2 \times 2 \times 3

HCF = 2 \times 2 = 4

(iv) 12, 16 and 28

12 = 2 \times 2 \times

16 = 2 \times 2 \times 2 \times 2

28 = 2 \times 2 \times 7

HCF = 2 \times 2 = 4

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