The announcer of the radio quiz show Nygma is listening to corrects the contestant, who says that there are 21 eyes in a standard deck of playing cards, by saying "You forgot to double it for two eyes!". In fact, three of the portraits on the face cards - the Jack of Spades, the Jack of Hearts, and the King of Diamonds - only have one eye. The contestant likely forgot to double his answer for the doubled portraits on each face card.