I have feet, but no legs. Which animal Am I?

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

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

What does the below image rebus riddle means ?

See the given image carefully. What you have to do is move the blue checkers in the position of the black checkers and vice versa. You are only allowed to move the checker to an adjacent empty space. Do it in the least possible moves.

There was an aeroplane crash, every single person died, but two people survived. How is this possible?

The answer I give is yes, but what I mean is no. What was the question?

A red house is made out of red bricks. A yellow house is made out of yellow bricks. And, a blue house is made out of blue bricks. So, what is a greenhouse made of?