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7 8 9 a
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The only possible points below which a 4-unit triangle can exist are 1 2 3 4 5 6.
The only 4-unit triangle starting, e.g. at 7 is the one covering 7 4 8 2 5 9 which is the same as the one starting at 2.
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| 7Nov2009,00:18 | #11 |
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2 3 4 5 6 7 8 9 a b c d e f The only possible points below which a 4-unit triangle can exist are 1 2 3 4 5 6. The only 4-unit triangle starting, e.g. at 7 is the one covering 7 4 8 2 5 9 which is the same as the one starting at 2. |
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| 7Nov2009,00:20 | #12 |
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Repost this time with code tags to preserve the formatting
Code:
1 2 3 4 5 6 7 8 9 a b c d e f |