Not enough sleep or disruptions to the sleep-wake cycle (such as those that may occur with shift work or travelling to a different time zone) cause the physiological state known as fatigue. Staying awake for 24 hours leads to a reduced hand-to-eye coordination that is similar to having a blood alcohol content of 0.1.
There are 13 hearts in a standard 52 card deck. There are also 13 diamonds, 13 spades and 13 clubs.
In the main deck, the minimum is 40 cards and the maximum is 60  cards. In the side and extra deck, anywhere from 0 to 15 cards is  acceptable (though you can have more than â¦ 15 during the Duel if you  have Pendulum Monsters).