If a number is 2^2 x 3^1 x 5^0 and b is 2^2 x 3^1 x 5^1 then hcf of a, b is?
(a) 2^2 x 3^1 x 5^1
(b) 2^2 x 3^2 x 5^2
(c) 2^1 x 3^1 x 5^0
(d) 2^2 x 3^2 x 5^0
I got this question in exam.
I'd like to ask this question from Number Theory topic in division Number Theory and Cryptography of Discrete Mathematics