Question

Find the HCF of 8 and 9 and 25 by the prime factorisation method. Hence, find their LCM.

Answer 1

Prime factorisation of 8. 9. and 25,

8= 2^3

9 = 3^2

25 = 5^2

Hcf ( 8 ,9 ,25) = 1

This is because there are no common nos in the prime factorisation of the nos 8 or 9 or 25.

LCM= 8*9*25

= 72*25

=1800