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by William Armstrong
1 Sep 2012
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5 Times 4-in-a-Line Puzzle

Genre: Geometry Puzzle Rating: 6 - Medium to Hard Source: Henry Dudeney
Brain Functions: Visual Thinking, Analysis Hint    Solution

We have a grid of 49 holes in a 7x7 square as shown. Ten of the holes have markers in them as shown. Move exactly three of the markers to different holes so that the markers are positioned into 5 straight lines of 4 markers per line.

5 Times 4-in-a-Line Puzzle

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