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Arnauld
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Finding Chord Segments with Integer Length
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Finding Chord Segments with Integer Length
According to your last edit, we should only exclude chords that are diameters. But something like (m,n,r)=(1,7,5) (with CS=BS) now looks valid. For X=100, I believe this would lead to 74 solutions instead of 37.
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Bingo square equivalents
minor clarification
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Bingo square equivalents
added a link to the code used to find the magic number
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Bingo square equivalents
@Tbw This is a variation of something I came up with earlier to get all reflections and rotations of a square matrix: [...15**6+""].map(d=>m=m.map((r,y)=>r.map((_,x)=>m[x][y]).so‌​rt(_=>-d))). There are actually a few other options.
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