How is the moon similar to a dollar?

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?

What Does this text mean:

important=important

What has lots of eyes, but can’t see?

You have an empty wine bottle with a cork that has been secured at the top in a normal way. There is a metal ring inside the bottle that is suspended by a string.

How can you make the metal ring drop to the bottom if you are not allowed to touch anything - not the bottle, not the cork, not the thread and not the ring?

At a bar, three friends, Mr Green, Mr Red and Mr Blue, were having a drink. One man was wearing a red suit; one a green suit; and the other a blue suit. 'Have you noticed,' said the man in the blue suit, 'that although our suits have colours corresponding to our names, not one of us is wearing a suit that matches our own names?' Mr Red looked at the other two and said, 'You're absolutely correct. What colour suit is each man wearing?

By using 'because' continuously three times, can you make an English statement ?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

Can you spot the hidden girl in the picture below?

Why Aeroplane windows are round?