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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.
Original – The missing square puzzle is an optical illusion used in mathematics classes to help students reason about geometrical figures. It depicts two arrangements of shapes, each of which apparently forms a 13×5 right-angled triangle, but one of which has a 1×1 hole in it.
The missing square. When the four quadrilaterals rotate about their centres, they fill the space occupied by the small red square. However the total area of the figure appears to remain unchanged The missing square (Edit 1). When the four quadrilaterals rotate about their centres, they fill the space occupied by the small red square.
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The challenge is to paint each cell black or white, subject to the following rules: Each numbered cell is an island cell, the number in it is the number of cells in that island. Each island must contain exactly one numbered cell. There must be only one sea, which is not allowed to contain "pools", i.e. 2×2 areas of black cells.
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Missing Link puzzle. Missing Link is a mechanical puzzle invented in 1981 by Steven P. Hanson and Jeffrey D. Breslow. The puzzle has four sides, each depicting a chain of a different color. Each side contains four tiles, except one which contains three tiles and a gap. The top and bottom rows can be rotated, and tiles can slide up or down into ...
Swap figures so missing square is below: 07:11, 20 January 2023: 512 × 683 (444 bytes) Cmglee