What is the riddle which can be asked all day with a different correct answer each time.

Rahul decided to meet Simran so he boards a local train from Bombay station. Just after the station, there is a 1km long tunnel. The train starts and is now accelerating. Rahul is a claustrophobic guy, so what is the best position for him to sit?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

Which number should replace the question mark?

Mr Red Lives in the red house.
Mr Green Lives in the greenhouse.
Mr Yellow Lives in the yellow house.

Who lives in the Whitehouse?

I have an eye but still cannot see.

Who am I?

Can you write down eight eights so that they add up to one thousand?

What Time Should the last watch show in the below figure?

Which is the rope you never skip with?

What is a word made up of 4 letters, yet is also made up of 3. Sometimes is written with 9 letters, and then with 4. Rarely consists of 6, and never is written with 5.