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 Line up (Posted on 2005-05-06)
Imagine a 3 dimensional grid with N x N x N points.
Place as many points as possible on this grid, such that there are no 3 points in a line (for N = 2, this is of course 8).
How much is it for N = 3, 4 or 5?

 See The Solution Submitted by Hugo Rating: 3.5000 (2 votes)

 Subject Author Date Puzzle Answer K Sengupta 2022-08-13 12:34:27 Puzzle Answer K Sengupta 2022-08-13 12:31:35 Answer! KC 2006-01-21 01:36:12 another way to look at it ronwilliams 2005-11-29 11:39:07 solution - i think! fiona 2005-07-11 14:14:47 hmmm j441167 2005-06-26 00:05:14 solution Justin 2005-05-15 02:59:03 re(3): N=4? probably not Justin 2005-05-14 01:53:55 re(2): N=4? probably not Tristan 2005-05-14 01:47:54 N=3;N=4;N=5 Justin 2005-05-13 23:56:32 re: N=4? probably not Justin 2005-05-13 23:33:36 re: N=3? - Max reached Tristan 2005-05-08 02:20:43 re(2): N=3? Charlie 2005-05-07 23:19:52 re: N=3? suman 2005-05-07 21:01:55 N=4? probably not Jer 2005-05-06 18:53:53 N=3? Jer 2005-05-06 18:43:27

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