The amount of pay being a professional Magic the Gathering player varies, but if your good enough, I would say around $100,000.
AROUND $2
60-75 cards,
Around 1.40 $ US.
check your local card store
Average price is $1.50
5cents-1.38$ [played to mint]
There is no real cheap place to get Magic the Gathering theme decks, but you can get them for a good price at the magic online store. Most websites selling decks sell them for a much higher price than necessary
Magic: The Gathering, is a game that uses cards during gameplay. The mugging card causes 2 damage to the opponent. The opponent cannot block this turn.
For someone just starting I, I'd go with the $20 near 300 card deckbuilder box.
It's hard to answer the question without proper context. But I'll try. At its most basic level, there is addition and subtraction of small integers. The math is quite simple, but sometimes a player must perform many such calculations and juggle them in his head at the same time to make the best decisions. The game is heavier in logic and critical thinking skills, which of course are vital to solving many math problems. Magic the Gathering is really as complex as you make it--kids will focus on the simpler integer math, while older players engage in much higher-level mathematical thinking.
As of August 6 2014 he held a median price of $22.06 USD on TCGplayer.com
If by best you mean most broken, then either Urza's Saga, Mirrodin, or Shadowmoor (that is by block not as much by set).