Question

Which of these numbers is prime?
33, 45, 57, 69, 53,49​

Answer 1

To determine which of these numbers is prime, we need to check if each number is divisible by any number other than 1 and itself.

Let's check the numbers one by one:

33: This number is divisible by 3, so it is not prime.

45: This number is divisible by 3 and 5, so it is not prime.

57: This number is divisible by 3 and 19, so it is not prime.

69: This number is divisible by 3 and 23, so it is not prime.

53: This number is not divisible by any other number than 1 and itself, so it is prime.

49: This number is divisible by 7, so it is not prime.

Therefore, the only prime number within the given numbers is 53.

The correct answer is 53.