Question

If two numbers are co-primes, at least one of them must be prime.

• A. True
• B. False

Answer 1

The correct option is B False

The explanation for the correct answer.

Explain a co-prime number:

Co-prime numbers can be defined as those numbers whose common factor is only $1$.

For example,$15$ and$32$are co-primes since their only common factor is $1$. But they both are also composite numbers.

So it is not necessary for a number to be prime if two of them are co-primes.

Hence, the given statement is False