Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What occurs twice in a week, once in a year but never in a day?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

A deaf and mute man goes to the train station. Tickets for the train are 50 cents each. The man goes to the ticket booth and hands the man inside just a dollar. The man in the booth hands him two tickets.

How did the man in the booth know to give him two tickets without even looking at him?

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

What English word has three consecutive double letters?

Write the next letter in this sequence.
O, T, T, F, F, S, S, E, __
**Hint: It is a Number Series Puzzle

Can you solve the below algebraic mathematical equation?

(J+O+I+N+T)3 = JOINT

If 21x = 79x, what is the value of x?