Can you find a number that lies one third of the distance between 1/3 and 2/3?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

Which is the smallest number that you can write using all the vowels exactly once?

The dirtier I get, the whiter I look. Who am I?

What 4-letter word can be written forward, backward or upside down, and can still be read from left to right?

What jumps when it walks and sits when it stands?

In The 1st month of this year(the year 2013), I noticed that the date 13-1-13 (13 January 2013) is special.

This date is special as:

Date * Month = Year.

Can you figure out which year of this century has a maximum number of such dates?

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

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

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?