HCF of co-prime numbers 4 and 15 is

HCF of co-prime numbers 4 and 15 was found as follows by factorisation: 4 = 2 xx 2 and 15 = 3 xx 5 . Since there is no common prime factor, HCF of 4 and 15 is 0. Is the answer correct ? If not, what is the correct HCF?

Consider two co-prime numbers 4 and 5. Are both of them prime numbers ?

L.C.M. of two co-prime numbers is always

H.C.F of two consecutive numbers is ………………..

If 'x' and 'y' are two prime numbers then their HCF is………….

The L.C.M and H.C.F of two number is 24, 4 resp. If one of the numbers is 12, the other number is………………?

If x and y are any two relative prime numbers, then their H.C.f is