posted by Ragib - March 14 2011 10:23:00 AM
find the number of odd coefficients in the expansion of (x+y)^2010.
Reply by Ragib - March 14 2011 10:43:16 AM
i think i should not have given it.i don't know very well if my solution is good's a math olympiad problem.

Reply by Caprico - March 14 2011 11:06:41 AM
Can I just say something? This is a site for riddles, not maths problems. And math riddles are much different from what you're posting. Just a suggestion. I usually come to this site to refresh myself from studies, and its a bit frustrating to solve math problems here too! Still, I'll try this out...

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