Combinatorics.

what is NATO summit ?
by gospel on May 19th, 2012 | 3 answers | in Combinatorics

by Anonymous on December 31st, 1969 | no answers | in

What is something that can only be understood or communicated through repetition?
by Ombliss22 on April 17th, 2012 | 3 people like this | 4 answers | in Combinatorics

Which would require more heat, melting 500 g of 0 degree celsius ice or turning 500 g of 100 degree celsius water into steam?
by amenra187 on February 2nd, 2011 | 1 person likes this | 2 answers | in Combinatorics

x+y=1 x-y=-5 solve this equations and show the graphing point where they meet
by ladysuzette on October 20th, 2010 | 1 person likes this | one answer | in Combinatorics

2{3x + 4[2x – (4 – x) – 3(4x – 3y)]} Somebody can solve this one and how to get the answer. Thanks
by ferdieavilla on July 16th, 2010 | 2 answers | in Combinatorics

A restaurant has 1 item on the menu Monday, 2 items Tuesday 3 items Wednesday, so forth. How many combos of items can you buy in a week?
by GeorgeGee left Answerbag (What's this?) on June 3rd, 2010 | one answer | in Combinatorics

N elements in a stack system,we know the order each element goes in,how many combinations can there be when all elements come out? In fact I've known the answer is 2n!/(n+1)n!^2,but why?
by Anonymous on November 29th, 2009 | no answers | in Combinatorics

Why is it impossible to rotate one corner cube of Rubik's cube, and leave everything else in place, no matter how hard I try?
by Alexander on November 9th, 2009 | 2 answers | in Combinatorics

Hi, can somebody please, help me approximate one of the following question? that is 1:min xQx - x*1 s.t x in {1,0}^n or 2:min xQx s.t x in{1,0}^n , x*1 <= b in both case Q is a positive defini
by ShunMaeda on October 31st, 2008 | no answers | in Combinatorics