The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

What has one letter and starts with an E?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

The more you take me, the more you leave me behind.
Who Am I?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Which fur should we be getting from the Lion?

How can you spell "White of an egg" in one word?
Hint: I know you can spell coke, poke, and joke.

John leaves home and then he takes three right turns. John wants to return to home but he was scared of Jacob, who is wearing a mask.

What is John Situation ?