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  • #: 25013
  • Price: free ($0.00) In Apple Store
  • Category: Games
  • Updated: 2011-03-04
  • Current Version: 1.11
  • 1.11 (iOS 4.0 Tested)
  • Size: 7.40 MB
  • Language: English
  • Seller: Sylvain MARSAULT
  • Requirements: Compatible with iPhone, iPod touch, and iPad. Requires iOS 3.0 or later
  • © Sylvain MARSAULT
  •  Add to Favorite apps



Fed up with Sudoku? Try Quadron and discover the famous 4 colours theorem! 2970 levels, hours of entertainment.

The 4 colours conjecture was first proposed in 1852 when Francis Guthrie, while trying to color the map of countries of England, noticed that only four different colors were needed. It has been notorious for attracting a large number of false proofs and disproofs in its long history.

It was proven in 1976 by Kenneth Appel and Wolfgang Haken. It was the first major theorem to be proved using a computer.


- 2970 problems to solve

- sober and elegant interface

- listen to your own music

What's New in Version 1.11

New GFX effects

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Rated 5/5 based on 1 customer reviews.


5/5 stars


This is a great puzzle app


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The information may be outdated (2011-03-28 03:33:11). For actual information go to iTunes

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