Question

4= 2x2 , 15= 3x5, so H.C.F. of 4 and 15 is
(a) 0
(b) 1
(c) 2
(d) 3

Answer 1

as prime factorisation of

4=2×2

and 15= 3×5

so, HCF (4,15) = 1

As HCF = highest common factor

as non other than 1 is common so,

(b) that is 1 is the hcf