there is over 15,000 cards atleast if you collected one of each from alpha to the newest set and more are created all the time, so to get a dead on number would almost be impossible. just count them yourselves from alpha to the newest set, let me know what you get to before you quit.
so i used a site that had all the cards from alpha to present and i found out that the acctual number is 10618 including the five colors of lands
As of June 12, 2010, I counted 11,179 different cards. I did some quick math using the gatherer, so I might be off a few.
As of Jan 31st, 2011, there are 20,043 unique cards. This includes EVERY card, from promo cards to tokens.
It is estimated that there are around 6 million participants of Magic: The Gathering worldwide, in up to 70 different countries.
That's imposible to answer sorry
There are over 60 Magic The Gathering FAQ on WikiAnswers.
Approximately 12 Million players as of 2011
Many MTG players are using online video chat services to play Magic, such as Skype, Oovoo, etc...
120 million amateur players worldwide
Magic is specifically designed to work with more than two players. Many abilities say "each opponent", rather than just "your opponent". There are a number of special sets, Commander, Planechase, and Archenemy, that are best played with more than two players.
41
A lot
90 and still more
not enough
70,000,000 (seventy million players worldwide)
Magic is played on many, many college campuses. To find out if there is an organization on your local campus one should contact the activities office. Since magic is so popular with college students, if your campus doesn't have a magic the gathering club, you should consider creating your own.
Have you tried reading the rulebook? Here is a link to it if you haven't. http://www.wizards.com/magic/rules/EN_Magic_Basic_Rulebook_20090710.pdf Magic: the Gathering is extraordinarily complicated, but basically, players use "land" cards to play creatures and other spells, in order to attempt to reduce his or her opponent's life total from 20 to 0 ("life points" would be a more accurate term to use, but many players dislike the reference to Yu-Gi-Oh!). For more detailed information, the rulebook is the best source for information.