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Mathematics 19 Online
OpenStudy (anonymous):

prime numbers between 21 and 35

OpenStudy (amistre64):

you can narrow down the list by writing all the odd numbers in the range, and then canceling out fives .... this should give you a reasonable list to work thru

OpenStudy (unklerhaukus):

prime numbers have factors , if you can factor are number say 21=(3)(7) then it isn't prime

OpenStudy (amistre64):

and 2 is the only even prime number

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