Question

Question 13 of 20 :

Select the best answer for the question.
13. Which of the following groups of numbers are all prime numbers?
O A.2.3,5,9
O B.7.17.29.49
O C.3. 11, 23, 31
O D.2.5, 15, 19
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Answer 1

Answer: C. 3, 11, 23, 31

Explanation:

None of these can be divided by anything except themselves and 1.