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2019-04-02, 15:14
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#1 |
"Mike"
Aug 2002
25·257 Posts |
April 2019
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2019-04-03, 13:45
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#2 |
"Ben"
Feb 2007
3·1,171 Posts |
Easy to find solutions. I wonder what "elegant" looks like for this puzzle; mine surely are not.
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2019-04-03, 14:35
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#3 |
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"Ben"
Feb 2007
3·1,171 Posts |
Found a solution for 4x4
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2019-04-03, 14:50
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#4 | |
"Rashid Naimi"
Oct 2015
Remote to Here/There
40078 Posts |
Quote:
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2019-04-03, 14:59
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#5 | |
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"Ben"
Feb 2007
3·1,171 Posts |
Quote:
 Are all of your averages integers? I.e., all row/col/diag sums are 0 mod 21 as well as prime? If so then you have a much better search algorithm than me. |
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2019-04-03, 15:13
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#6 | |
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"Rashid Naimi"
Oct 2015
Remote to Here/There
3×5×137 Posts |
Quote:
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2019-04-03, 16:46
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#7 |
"Luke Richards"
Jan 2018
Birmingham, UK
25·32 Posts |
Thanks for sharing. My year 10 class (aged 14-15) had great fun with this today.
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2019-04-03, 17:55
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#8 |
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1976 Toyota Corona years forever!
"Wayne"
Nov 2006
Saskatchewan, Canada
22·7·167 Posts |
Yes quite easy indeed.
...
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2019-04-07, 20:36
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#9 |
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"Rashid Naimi"
Oct 2015
Remote to Here/There
80716 Posts |
Well, I did a 101x101 matrix because I found it interesting to write a code to generate a code to solve the large matrix. Otherwise it would have been prohibitively too much work to type the code to check all the 101+101+2 averages.
ETA Again, I wished someone would write a "foreach" style function for the PARI-GP vectors/matrices or add a few decent numeric examples to the forvec loop documentation. Last fiddled with by a1call on 2019-04-07 at 20:59 |
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2019-04-08, 15:01
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#10 | |
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Romulan Interpreter
Jun 2011
Thailand
100101100010112 Posts |
Quote:
now yafu is very angry with his daddy... 
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2019-04-09, 13:35
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#11 | |
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"Ben"
Feb 2007
DB916 Posts |
Quote:
Anyway, I picked this back up and figured out a few more things, but I don't think I'll bother to progress much beyond 6x6. |
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