Question

Q1-Q 10 are multiple choice questions. Select the most appropriate answer from the given options.
(1) a and b are two positive integers such that the least prime factor of a is 3 and the least prime factor of O is
5, then least prime factor of (a + b) is :
(a) 3
(b) 5
(d) 1
(c) 2
​

Answer 1

$\fontsize{18}{10}{\textup}{\textbf{The least prime factor is 2}}}$

Step-by-step explanation:

From the given condition, we can confirm that both the numbers are odd, because their least prime factors are odd

If a number does not have 2 as its least prime factor, its is definitely odd because if it does not have 2, it will not have any other even number

Now, if we add two odd numbers, we get an even number

So the least prime factor of (a+b) is 2