How can a man go eight days without sleep?

What breaks yet never falls, and what falls yet never breaks?

There are three houses in a straight row. One is red, one is blue, and one is white. The red house is left of the middle. The blue house is right of the middle. Where's the white house?

What has one letter and starts with an E?

What is in seasons, seconds, centuries and minutes but not in decades, years or days?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

I’m tall when I’m young, and I’m short when I’m old. What am I?

All of the flowers I have are orchids except two. All of the flowers I have are hibiscuses except two. All of the flowers I have are roses except two.

Can you tell me how many flowers I have?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

What does the below image rebus riddle means ?