That attorney is my brother, testified the accountant.

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

Who is lying?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

Below, you will find the mathematical proof that 10 equals 9.99999?. But is that possible or there is something wrong about it? Can you find the error?

x = 9.999999...
10x = 99.999999...
10x - x = 90
9x = 90
x = 10

I am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

When is the top of a mountain similar to a savings account?

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