Which of the following is NOT a prime number? A) 2 B) 3 C) 4 D) 5

Explanation:

A prime number is a natural number greater than 1 that has no positive divisors other than 1 and itself. Let's examine each option:

• A) 2 is a prime number because its only divisors are 1 and 2.
• B) 3 is a prime number because its only divisors are 1 and 3.
• C) 4 is NOT a prime number because it is divisible by 1, 2, and 4.
• D) 5 is a prime number because its only divisors are 1 and 5.

Therefore, the number that is NOT prime is 4.

Answer: C) 4