This number gets around: It's the name of a popular card game and a
famous New York restaurant.  It's part of an honor bestowed on
Presidents and part of a myth about a famous outlaw.  What is it? 
What's another common name for the card game?  What street is the
restaurant on?  What's the honor?  Who's the outlaw and what's the
myth?

Hi sushmita780,

The number is 21.

Card game: 21
Another common name: Blackjack

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Famous New York restaurant: Club 21
Street: W 52nd Street

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Part of an honor bestowed on Presidents: 21 Gun salute
"...Today the national salute of 21 guns is fired in honor of a
national flag, the sovereign or chief of state of a foreign nation, a
member of a reigning royal family, and the President, ex-President and
President-elect of the United States. It is also fired at noon of the
day of the funeral of a President, ex-President, or President-elect."

USA Patriotism
http://www.usa-patriotism.com/reference/21_gun_salute.htm

==============================

Part of a myth about a famous outlaw: Billy the Kid, killed 21 men by
the age of 21.
"Born in New York City, Billy the Kid (also William H. Bonney and
William Antrim) moved west and became one of the most famous outlaws
in American history, responsible for killing 21 men in his 21 years.
The facts of Billy the Kid's exploits remain sketchy, but it is
generally agreed that he was quick with his gun and his temper."

Who2: Billy the Kid
http://www.who2.com/billythekid.html


I hope that helps.

Best regards,
Rainbow

Thank you very much!  You were superbly clear with your answer!  :o)

Also the name of a quiz show aired in the US in the 1950s
Mongolia

I think that the honor bestowed on presidents is Feb 21, presidents day