Question

find the hcf and lcm of 100 and 75 by prime factorization.

Answer 1

Find the hcf and lcm of 100 and 75 by prime factorization.

100 = 2*2*5*5

75 = 5* 5*3

so 

hcf = 5*5 

         = 25

lcm =  5*5*2*2*3

       = 25 *4*3

      = 100 *3

        = 300

:)

Answer 2

100= 2*5*2*5
75= 3*5*5
HCF= 5*5= 25
LCM= 5*5*2*2*3=300