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Which of the following groups of numbers are all prime numbers? A. 2, 5, 15, 19 B. 7, 17, 29, 49 C. 2, 3, 5, 9 D. 3, 11, 23, 31

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  1. 29 April, 03:32
    0
    Some prime numbers

    2,3,5,7,11,13,17,19,23,29,31

    just try to divide by those and if you an, then it isn't prim

    A. 15/3=5 so not prime

    B. 49/7=7, not prime

    C. 9/3=3 not prime

    D. all prime

    answe ris D
  2. 29 April, 03:39
    0
    So,

    The prime numbers from 1 to 50 are: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47.

    Group A contains 15, which is a composite number (3 * 5).

    Group B contains 49, which is a composite number (7 * 7).

    Group C contains 9, which is a composite number (3 * 3).

    Group D contains no composite numbers. They are all prime.

    Group D contains only prime numbers.
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