Question

26,603 Learners found this answer helpful

which number is prime? 18 4 5 6

Explanation:

Step1: Recall prime number definition

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

Step2: Analyze 18

Factors of 18: \(1, 2, 3, 6, 9, 18\). Not prime.

Step3: Analyze 4

Factors of 4: \(1, 2, 4\). Not prime.

Step4: Analyze 5

Factors of 5: \(1, 5\). Prime.

Step5: Analyze 6

Factors of 6: \(1, 2, 3, 6\). Not prime.

Answer:

5 (since it has only 1 and 5 as divisors, meeting the prime number definition)