- #1
Firepanda
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Prove that in every year, there is at least 1 friday the 13th in the period from march to october.
Well.. the only thing I can find about this is that it might use Zellers forumla:
http://en.wikipedia.org/wiki/Zeller's_congruence
Apart from that I've no idea :) I can't seem to relate it to the problem. I've always failed at proofs. :p
thanks!
Well.. the only thing I can find about this is that it might use Zellers forumla:
http://en.wikipedia.org/wiki/Zeller's_congruence
Apart from that I've no idea :) I can't seem to relate it to the problem. I've always failed at proofs. :p
thanks!