CDR Match 6 - 2010 Raytheon MATHCOUNTS National Competition

[jwm239]

...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.

[TheLIONSTIGERSfan]

yea i went to school with him

[Hydroblast101]

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

[jwm239]

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