Question

Find the HCF of the given numbers by prime factorisation method:

(ii) 54, 72,90 (iii) 105, 140, 175.
mind the HCF of the giyen numbers by division method:​

Answer 1

HEY MATE!

(i) 54,72,90

54=2 x 3 x 3 x 3

72=2 x 2 x 3 x 3 x 2

90=2 x 3 x 3 x 5

HCF=2 x 3 x 3 = 18

(ii) 105,140,175

105=3 x 5 x 7

140=2 x 2 x 5 x 7

175=5 x 5 x 7

HCF=5 x 7=35

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