https://ibb.co/XLn0bxH
The each of the 6 cards is missing a number that is present in the remaining 5 cards. By asking a player a number is present in the card or not, the number can be deducted. Eg, 55 is missing in the top left card. The problem is to generate all 6 cards in J. ---------------------------------------------------------------------- For information about J forums see http://www.jsoftware.com/forums.htm