Question

A and b are two positive integers such that the least prime factor of a is 3 amd the least prime factor of b is 5 then calculate the least prime factor of a +b

Answer 1

Answer:

2

Step-by-step explanation:

As the least prime factor of a is 3, this means that 2 is not a prime factor of a, so a is odd.

Similarly, as 2 is not a prime factor of b, so b is odd.

Therefore a+b is even so its least prime factor is 2.