Which of the following is not a prime number? – Just Crack Interview

Ques:- Which of the following is not a prime number?

A. 43

B. 29

C. 23

D. 21

2 1218

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2 Answers on this Question

Shubham Patidar says:

October 7, 2021 at 3:41 pm

21 is not prime number because its divide by 1,3,7,21

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vaishnavi says:

October 7, 2022 at 5:19 pm

21

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