Can you convert the number zero(0) into a positive number using just one mathematical operator ?

A farmer and his neighbour once went to Emperor Akbar"s court with a complaint. "Your Majesty, I bought a well from him," said the farmer pointing to his neighbour, "and now he wants me to pay for the water."
"That"s right, your Majesty," said the neighbour. "I sold him the well but not the water!"?
The Emperor asked Birbal to settle the dispute. How did Birbal solve the dispute?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

Can you find the hidden animal in the picture below?

You can see three almost identical images below. Can you spot the odd one out from them?

Consider this: Arnold Schwarzenegger has a big one. Michael J. Fox has a small one. Prince doesn’t have one. The Pope has one but never uses it. Bill Clinton has one and uses it all the time. What is it?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?

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