Question

is 23 a prime number or a composite number? prime number composite number submit

Explanation:

Step1: Recall prime number definition

A prime number is a number greater than 1 that has no positive divisors other than 1 and itself.

Step2: Check divisors of 23

We test divisors from 2 to $\sqrt{23}\approx4.8$. Divisors to check: 2, 3, 4.

• 23 ÷ 2 = 11.5 (not integer).
• 23 ÷ 3 ≈ 7.67 (not integer).
• 23 ÷ 4 = 5.75 (not integer).

So 23 has only 1 and 23 as divisors.

Answer:

A. prime number