A pack of similar cards is offered, from which two or three persons draw
cards. They should not sit too closely together, however, lest one
should see the cards drawn by the others. They note their cards and
replace them in the pack. You turn, and while pretending to look through
the pack, you take two other cards which you must have at hand, place
with them a card out of the pack, and approach those persons who have
drawn cards, asking each if his card is not among the three. On
receiving an answer in the affirmative, you point out the drawn card.