Recently Favorited Questions

• polygon 2007
  Given a regular 2007-gon. Find the minimal number k such that: Among every k vertexes of the polygon, there always exists 4 vertexes forming a convex quadrilateral such that 3 sides of the quadrilateral are also sides of the ...
  0·6· #Mathematics#Olympiad Stuff
  favorited2012-06-04 07:08:36
• crack this
  Find all pairs (x, y) of integers such that x^3 - y^3 = 2xy + 8 ...
  0·11· #Mathematics#Olympiad Stuff
  favorited2012-06-04 07:08:36