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25 June, 06:50

Tell which number is prime: 15, 23, 45, 51

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Answers (2)
  1. 25 June, 06:55
    0
    23 is a prime number. Since 15,45, and 51 all are divisible by 3
  2. 25 June, 07:11
    0
    The prime number is 23
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