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1 September, 06:40

Which number is prime?

A.

57

B.

63

C.

51

D.

59

+4
Answers (2)
  1. 1 September, 09:22
    0
    D. 59 is the answer
  2. 1 September, 10:04
    0
    It's D. 59, because all of the other numbers are divisible by 3, and you can tell by adding up the digits. (5 + 7 = 12, 3 * 4 = 12) (6 + 3 = 9, 3 * 3 = 9) (5 + 1 = 6, 3 * 2 = 6)
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