Question

What is the HCF of 17 and 120?

Answer 1

120=2*2*2*3*5*1
and 17=17*1
so hcf is 1

Answer 2

prime factorisation of 17 is 17*1

and prime factorisation of 120 is 2*2*2*3*5*1

therefore hcf of 17 and 120 is 1

hope it's help you