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The "nine dots" puzzle. The puzzle asks to link all nine dots using four straight lines or fewer, without lifting the pen. The nine dots puzzle is a mathematical puzzle whose task is to connect nine squarely arranged points with a pen by four (or fewer) straight lines without lifting the pen or retracing any lines.
Implemented with multiple templates. Call tree order: Template:Sudoku 9x9 grid top wrapper, set defa values Template:Sudoku 9x9 table table with 9 boxes, 81 cells, major grids, outer border]] Template:Sudoku 3x3 box 3x3 box 9 cells Template:Sudoku 3x3 table 3x3 table with 9 cells, int. grids only, no outer border
The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures; or rather to teach them not to reason using figures, but to use only textual descriptions and the axioms of geometry. It depicts two arrangements made of similar shapes in slightly different configurations.
Exercise your brain and sharpen your mind (the fun way!) with these 13 types of brain training games. The post Best Brain Training Games: Riddles, Brain Teasers, Puzzles, and More appeared first ...
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The Egg of Columbus (Ei des Columbus in German) is a dissection puzzle consisting of a flat egg-like shape divided into 9 or 10 pieces by straight cuts. The goal of the puzzle is to rearrange the pieces to form other specific shapes, such as animals (see below). The earliest known examples were produced by German toy manufacturer Richter ...
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