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  2. Zebra Puzzle - Wikipedia

    en.wikipedia.org/wiki/Zebra_Puzzle

    The Zebra Puzzle is a well-known logic puzzle.Many versions of the puzzle exist, including a version published in Life International magazine on December 17, 1962. The March 25, 1963, issue of Life contained the solution and the names of several hundred successful solvers from around the world.

  3. List of free and open-source Android applications - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    Android phones, like this Nexus S running Replicant, allow installation of apps from the Play Store, F-Droid store or directly via APK files. This is a list of notable applications (apps) that run on the Android platform which meet guidelines for free software and open-source software.

  4. List of Android app stores - Wikipedia

    en.wikipedia.org/wiki/List_of_Android_app_stores

    The Google Play store had over 50 billion app downloads in 2013 and has reached over 2.96 million apps published in 2020. Although bundled with most Android devices, the Play Store is only available on devices that are certified within the "Android Compatibility Program". As a result, manufacturers of so-called "custom ROMs", i.e., modified ...

  5. apk (file format) - Wikipedia

    en.wikipedia.org/wiki/Apk_(file_format)

    To make an APK file, a program for Android is first compiled using a tool such as Android Studio [3] or Visual Studio and then all of its parts are packaged into one container file. An APK file contains all of a program's code (such as .dex files), resources, assets, certificates, and manifest file. As is the case with many file formats, APK ...

  6. David Smith (amateur mathematician) - Wikipedia

    en.wikipedia.org/wiki/David_Smith_(amateur...

    Smith discovered a 13-sided polygon in November 2022 whilst using a software package called PolyForm Puzzle Solver to experiment with different shapes. [4] After further experimentation using cardboard cut-outs, he realised that the shape appeared to tessellate but seemingly without ever achieving a regular pattern.

  7. Einstein problem - Wikipedia

    en.wikipedia.org/wiki/Einstein_problem

    Such a shape is called an einstein, a word play on ein Stein, German for "one stone". [ 2 ] Several variants of the problem, depending on the particular definitions of nonperiodicity and the specifications of what sets may qualify as tiles and what types of matching rules are permitted, were solved beginning in the 1990s.

  8. The Hardest Logic Puzzle Ever - Wikipedia

    en.wikipedia.org/wiki/The_Hardest_Logic_Puzzle_Ever

    The Hardest Logic Puzzle Ever is a logic puzzle so called by American philosopher and logician George Boolos and published in The Harvard Review of Philosophy in 1996. [1] [2] Boolos' article includes multiple ways of solving the problem.

  9. EinStein würfelt nicht! - Wikipedia

    en.wikipedia.org/wiki/EinStein_würfelt_nicht!

    EinStein würfelt nicht 3D. EinStein würfelt nicht! (Einstein/"OneStone" does not play dice) is a board game, designed by Ingo Althöfer, a professor of applied mathematics in Jena, Germany. It was the official game of an exhibition about Albert Einstein in Germany during the Einstein Year (2005). The name of the game in German has a double ...