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Wich if the given numbers are composite?15,19,23,31,49,55,59,87,91,97,103,105
17 years ago

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drwls
Compare to the list of them here:

http://www.math-worksheets.info/Composite_numbers.html

The list goes as far as 100. Beyond that, 103 is prime and 105 has more than two prime factors (5,21,3,35,7, and 15), so they are not composite.
17 years ago

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