Question

If a and b are two consecutive natural numbers, then H.C.F (a, b) is :​

Answer 1

The HCF of any two consecutive natural number is always 1...i.e, Coprime...

You can consider any two consecutive natural number and find out their HCF..you always get 1...
For example 20 and 21 are two consecutive natural numbers...and their HCF is 1...

So , HCF of two consecutive natural number is 1...