430. The Constellation Puzzle. The group of stars depicted in the figure is very difficult to spot even on the clearest night for the simple reason that it... is invisible. 21 stars of this constellation form 7 straight lines with 5 stars on each.
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Could you rearrange the stars so that they form 11 straight lines with 5 stars on each? There are many solutions to this puzzle. Try to find a symmetrical one.
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Official solution
430. The figure shows a symmetrical solution in which 21 stars form 11 lines with 5 stars on each line.
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Source: NuminaMath-1.5,
licensed Apache-2.0.
Statement and solution reproduced as published; topic, difficulty and ordering added
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