Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Choice number

  1. Feb 4, 2009 #1
    Is there a fast way of determining whether a number x is of the form "a choose b" for some a and b (a and b are not given, obviously)? I guess a good way to start is to find the largest factorial which divides x.
  2. jcsd
  3. Feb 4, 2009 #2
    Every natural number has that property, remember that x choose 1 is x.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: Choice number
  1. Is spline best choice? (Replies: 0)

  2. Choice of branch-cuts (Replies: 7)