Question

A and B are two positive integers such that the least prime factor of a is 3 and the least prime factor of B is 5 then the least prime factor of a + b
a-2
b-3
c-5
d-8

Answer 1

Since 3 is the least prime factor of a, let a= 3x and since 5 is the least prime factor of b, let b = 5x

Least prime factor of a+b = 3x +5x =8x.

Therefore, one common factor is 8 and least common factor of 8 is 2.

Therefore,least common factor of a+b is 2

Hope this helps!