CaptainEd

Maybe this is clear:

Dang! I guess I was using fuzzy logic.

That’s my issue, for sure.

Nice, Bonanova! Definitely not the obvious answer.

Rocdocmac, I found it to be interesting, and I felt I learned something while attempting to solve it. Also I was impressed at the originality of the problem. Thanks! Thalia, thanks for showing us that I wasn’t crazy!

After elimination of columns, do the row totals all still have to be equal (although maybe equal to 6 or 5?)

I’m sad that I don’t get it yet, maybe I don’t know what “circumference” means...

Nice puzzle, Rocdocmac, I think the desired answer is

Plainglazed, you asked perfectly clearly. I wish I had done such a clear job of answering as bonanova did. Thanks for the fun puzzle!

Ooh, now I see what you mean. Much different problem. Sorry

Sorry, proof was right, but method for calculation was confusing

Hah! It’s exactly right!

Tricky enough as it is—here is my first cut

We are not limited to convex figures, right?

Mixed strategies for you and for me