Question

What is the largset prime number less that 40

Answer 1

37

Explanation:

37 can only be divided by 37 and 1, nothing else.

38 is divisible by 2 and 19.

39 is divisible by 3 and 13.

Answer 2

37

Explanation:

37 can only be multiplied by 1 and 37. Because prime numbers cannot be multiplied by any whole number except 1 and itself, the answer must be 37.