Is 9 A Prime Number
t divisible by 2. Therefore, 7 is a prime number. 15: √15 ≈ 3.9. We check divisibility by 2 and 3. 15 is divisible by 3. Therefore, 15 is a composite number. 17: √17 ≈ 4.1. We check divisibility by 2, 3. 17 is not divisible by 2 or 3. Therefore, 17 is a prime number. Summary In conclusion, 9 is no