Question

The sum of two numbers is 18. If their product is a prime number, the ratio of larger number to smaller is:-
1. 13/5
2. 4
3. 17
4. 1

Answer 1

Correct Answer - Option 3 : 17

Let numbers are = x, y 

According to question;

x + y = 18

x × y = Prime number 

There is only one possibility that the product of numbers is a Prime number;

x = 17 and y = 1

So, the Ratio of numbers is 17 : 1.

Hence, "17" is the correct answer.