You are allowed 40 to 60 cards in your deck.
there is no limit
40
40 or more.
You can have up to 3 copies of each card of the Crystal Beast series in your Deck. There is no limit to the amount of Crystal Beast cards you can have in a Deck.
A standard deck of playing cards typically contains 52 cards, with no specific limit on the number of "V cards" allowed.
Well, the minimum in a yugioh deck is 40 cards maximum 80cards. Most people try to have a smaller deck over a larger deck, to get cards they need. About a 40-50 card deck is good.
60, You can only have four cards with the same name in the deck.
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.
That would make a bad deck, considering all that would require too many Tributes