Posted by **keshav** on Sunday, June 9, 2013 at 12:04am.

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 -
**rishabh**, Sunday, June 9, 2013 at 4:36am
can anybody solve it..?

## Answer This Question

## Related Questions

- maths - For how many ordered pairs of positive integers n and k with n and k ...
- algebra - For how many pairs of positive integers n and k with n and k less than...
- pcm - For how many pairs of positive integers n and k with n and k less than or ...
- MAths - Find the number of ordered pairs of distinct positive primes p, q (p&#...
- Number Theory.,Math - How many ordered pairs of positive integers (a,b) are ...
- number theory, math - How many ordered pairs of positive integers (a,b) are ...
- MATH - Let’s agree to say that a positive integer is prime-like if it is not ...
- math - Let’s agree to say that a positive integer is prime-like if it is not ...
- math - 35. If b is positive integers less than 400 and more than 100, then how ...
- math - Find the sum of all positive integers m such that 2^m can be expressed as...

More Related Questions