If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I am white when I am dirty, and black when I am clean. What am I?

John was piloting a plane behind a car but was never able to overtake it. Why?

In an interview, a boy was asked an unusual question 'How two persons sitting with a table in between them can't see each other?' He was unable to reply. Can you?

I have a big mouth and I am also quite loud! I am NOT a gossip but I do get involved with everyone's dirty business.

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

What is the Surname of Barbie Doll?

I am a five-letter word and comprises two different vowels and three same consonants. I am so strong that I can spoil your entire work.

Can you find out who am I?

You can find some missing letters in the picture. By placing two particular letters in the spaces, you can form a nine lettered word beginning from one of the corners and going clockwise direction to the middle. Can you find out the letters and the word?

If an electric train is travelling south, then which way is the smoke going?