You find the HCF of the two numbers, not their product. Example: 30 and 42 Factor them. 2 x 3 x 5 = 30 2 x 3 x 7 = 42 Select the common factors. 2 x 3 = 6, the HCF
6
6
6
Prime factorization is one of the ways you find the HCF.
The HCF is: 2
highest common factor is 6
The GCF is 70.
HCF(30, 36, 42) = 6 LCM(30, 36, 42) = 1260
hcf = 42, lcm = 84.
The GCF is 42.
It is: 14