For those who simply hate Maths in school but play Yugioh...

Maths is important to a lot of card games like Poker and even Yugioh. You can use Math to help calculate the probability of your cards and your opponent cards. For those who are bad in Maths (like me), Jason Grabher-Meyer has written a very interesting article about it over at TCGPlayer.com: Ten Numbers to make you a better Duelist