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2 November, 05:47

if n is the largest two digit nuber that can be expressed as the product of two prime numbers greater than 3, what is the value of n?

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  1. 2 November, 05:55
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    List of the first few prime numbers greater than 3:

    5, 7, 11, 13, 17, 19, 23, 29

    Now find the combination that you can multiply and still have a 2 digit number:

    5 x 7 = 35

    5 x 11 = 55

    5 x 13 = 65

    5 x 17 = 85

    5 x 19 = 95

    5 x 23 = 115 (3 digit number, can't use).

    7 x 5 = 35

    7 x 11 = 77

    7 x 13 = 91

    7 x 19 = 133 (3 digit number, can't use).

    The largest 2 digit number would be 5 x 19 = 95
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