Question

find the H.C.F and L.C.M of 6,72 and120 using theprime factorisation

Answer 1

prime factorisation of 6= 1,2,3,6
prime factorisation of 72= 1,2 3 4 6 8 9 12 18 24 36 72
prime factorisation of 120=1,2,3,4,5,6,8,10,12,15,20,24,30,40,60,120
common factor=1,2,3
hcf=3
LCM=120