Which of the following is a prime number?
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✅ Correct answer: C. 17
17 has no divisors other than 1 and itself. 9 = 3x3, 15 = 3x5, 21 = 3x7.
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Tap an option to check your answer.
✅ Correct answer: C. 17
17 has no divisors other than 1 and itself. 9 = 3x3, 15 = 3x5, 21 = 3x7.
10 random questions, instant feedback, earn XP.