Question

Sum of two prime numbers is $43,$ then their product is

• A. $91$
• B. $82$
• C. $63$
• D. $78$

Answer 1

The correct option is B $82$

Since, $43$ is odd and we know that sum of two natural number is odd, is possible only when one number is odd and another is even.

The only even prime number is $2$ so another prime number must be $41.$
So, product $=2\times 41=82$