Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

I am the one who remains awake when you sleep. But I need to rest when you awake. Who Am I?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

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

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

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

One day, Birbal got late for a function and Akbar was highly disappointed.
Please forgive me Jahanpanah. I arrived late because my child was crying and I had to calm him down, explained Birbal.
Does it take this long to placate a child? questioned the emperor. I feel that you have no idea about how to raise a child. I order you to act like a child and I will act like your father to show you how you should have dealt with your child. Come on! Ask me all that he asked from you.
Father, I want a cow, said Birbal.
The emperor quickly ordered one of the servants to bring a cow to the kingdom.
I want to drink its milk, now, now, now! said Birbal, imitating the voice of his child.
Akbar asked his servants to milk the cow and give to Birbal.
The servants quickly milked the cow and offered the milk to Birbal. He sipped in a little and then gave the bowl to the emperor.
As Birbal put up the next demand that was put up by his child a few hours ago, the emperor was stunned and left the room.
What did Birbal say?

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?

It's a 7-letter word.
If we remove 1 letter from it, it remains the same.
If we remove 2 letters from it, it remains the same.
If we remove 3 letters from it, it remains the same.
If we remove all the letters from it, still it remains the same.
What is it?

What does this mean?

CCCCCCC

I don't get anymore wetter, no matter how much rain falls on me.