CDR Match 6 - 2010 Raytheon MATHCOUNTS National Competition

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Uploaded by on Apr 22, 2011

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  • ...at 2:10 - one of the primes must be 2 - the only even prime - so a number ending in "3" as the difference of two primes can only be 3 itself (5 - 2), as all differences are of the form 5n - 2, with 5n being composite for all odd n>1, alas.

  • @Hydroblast101 ...Canada does not have a "MathCOUNTS" equivalent...?

  • yea i went to school with him

  • Alex Song is actually from Canada. He moves to the USA during the school year so thast he can do MathCounts

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