Posted by keshav on Friday, June 7, 2013 at 10:39pm.
For how many ordered pairs of positive integers n and k with n and k less than or equal to 20, is the number
((2n)!(2k)!) / (n!k!(n+k)!) an integer?

maths  keshav, Saturday, June 8, 2013 at 3:24am
yr pls someone solve it.....

maths  Shame, Saturday, June 8, 2013 at 11:17am
Noone will solve it for you you cheat!!! Copying questions from Brilliant huh? Lame, lame!!!

maths  keshav, Sunday, June 9, 2013 at 12:06am
so whats ur problem i mean usmey aapko problem kya hai..?
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