Problem no.3- For a positive integer n, find the number of solutions of the congruence x
2 ≡ 1 (mod n).
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- Thu Feb 07, 2013 7:36 pm
- Forum: National Math Olympiad (BdMO)
- Topic: Let us help one another preparing for BdMO national 2013
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- Thu Jan 31, 2013 12:56 pm
- Forum: National Math Olympiad (BdMO)
- Topic: BdMO National Higher Secondary 2009/9
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Re: BdMO National Higher Secondary 2009/9
Is the answer $2^n-(n-1)n$ ?