You are allowed 40 to 60 cards in your deck.
A standard deck of playing cards typically contains 52 cards, with no specific limit on the number of "V cards" allowed.
60, You can only have four cards with the same name in the deck.
there is no limit
59
The maximum is 60 in the main deck.
In the official rules, a deck can have up to 4 EX cards.
It is currently now called the "Extra Deck", and a maximum of 15 cards (Fusion, Synchro, Xyz Monsters) are allowed.
There are 52 cards in a deck of cards.
There are 52 cards in a playing deck.
There are four nines in a deck of cards.
In a normal deck there are 39 such cards.