Of the following numbers, which one os prime : 14,13,21,23

Question

Wiggles

Mathematics

28 January, 16:06

Of the following numbers, which one os prime : 14,13,21,23

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Answers (1)

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Karlie Campbell · Answer 1

Prime refers to numbers that cannot be divided by any number but themselves and 1.

14 can be eliminated, as it is even (no primes except 2 are even)

13 has no divisors. It is prime.

21 has 4 divisors. It is not prime.

23 has no divisors. It is also prime.

Two numbers of this list are prime; 13 and 23.