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Posted 15 March 2013 - 02:50 PM
Actually, we should split the difference and go with 27.Spoiler for missed symmetry
Good one, Prime! Those two are in fact the same. The drawing certainly helps to see it.
Posted 18 March 2013 - 04:53 AM
Someone posed this problem to me, and I tried several ways to count cases and finally gave up.
This prize is a cooperative sharing of k-man and Prime, but I can mark only one post.
So I marked the post that got the final count.
Good job both!
- Bertrand Russell
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