There are no "tricks" in Blackjack. The term you are referring to is "5 card charlie", and no most casinos do not pay on it.
This is called a five-card trick, and in some tables it beats anything except a blackjack.
if the blackjack is a natural i.e. you get 21 from the first deal, then no. But if the 5-card charlie comes after you have been dealt 3 or more cards, then yes
A jack card and a 10 card in blackjack equals 20 points.
blackjack
Euchre, blackjack, rummy, and solitaire are all card games.
blackjack
Baccarat is a card game with similarities to blackjack.
Blackjack, that is an Ace with any 10 value card.
Euchre, blackjack, rummy, and solitaire are all card games.
I believe the name "blackjack" may have come from the fact that originally players were paid extra when they were dealt a spade-suited blackjack with an Ace and Jack.
no
There are different values that are shown on each card. Furthermore, the value of the card depends on the game. In cribbage, for example, Jacks are worth 5. In blackjack, they are worth 10.