A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

You are a cab driver who pools passengers. You pick 3 people from a destination and drop 1 after an hour. 2 people climb aboard at the same time and you drop 3 at the next destination. After some time, you pick 2 passengers only to drop 1 after a short distance where 3 more passengers climb up the cab. You leave the rest of the passengers one by one to their destination and then come back home.

Can you tell the eye color of the cab driver?

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

What work can one never finish?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?

Using eight eights and addition only, can you make 1000?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

A frog is at the bottom of a 30-meter well. Each day he summons enough energy for one 3-meter leap up the well. Exhausted, he then hangs there for the rest of the day. At night, while he is asleep, he slips 2 meters backwards. How many days does it take him to escape from the well?