Thanks Ady.

I was thinking along such lines after Charlie's post.  I waited to see your proposal.

It really is a pity that scholars have the ability (until the solution is posted) to be able to edit their own problems - reserved html words excepted.

I just wish I could recall exactly how I derived this problem, I think I was playing with arrangements of TEA and took it into Excel .... and didn't save :-(

Posted by brianjn on 2013-02-08 04:30:14