is always divisible by p if p is prime?

Thanks for any help

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- Mar 9th 2011, 08:42 AMhmmmmsum of the numbers less than p divisible by p?
is always divisible by p if p is prime?

Thanks for any help - Mar 9th 2011, 09:26 AMtopspin1617
- Mar 9th 2011, 09:40 AMhmmmm
as p-1 is even (so divisible by 2) then it is divisible by p?

- Mar 9th 2011, 05:19 PMtopspin1617
Exactly. Writing the sum as I did above, you immediately get what you have just written.