My kids tend to lose cards quite often but we still play some games.
For example: We have assembled quite a pile of cards and are playing a game in which all the cards are dealt out before playing.
If two people are playing-1 card will be left,
3 people-2 cards left,
4 people-3 cards left,
5 people- 4 cards left,
6 people-5 cards left,
and 7 people- 0 cards left
How many cards are in this deck?