Here is an arrangement of 19 cards. What card should go in the bottom right corner?

4♣  4♠  3♦  3♥   2♥

9♠  7♦  6♥  2♣   4♥

8♦  4♥  5♠  A♣   7♦

6♥  3♠  2♣  8♦   ? 

I took a look at it using a erythorbic appoach.  The Benzoate approach also helped, but I was stuck until the EDTA resulted in a yellow 5.

But I may have done it incorrectly.

Posted by Leming on 2006-03-17 16:08:33