That attorney is my brother, testified the accountant.

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

Who is lying?

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

Can you find out the remainder when 3^300 is divided by 5?

What is black when you buy it, red when you use it, and gray when you throw it away?

I get hot but I never sweat,
I cook food but I am not a chef,
I have a door but you can't enter me,
I have a light but I am not a lamp.
Who am I?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

If one and a half boys, eat one and a half burgers in one and a half hours.

How many burgers can 9 boys eat in 3 hours?

Name a key which is hardest to turn.