I travel all around the world but always stay in the corner. What am I?

What is always in front of you but can’t be seen?

How can you drop a raw egg from a height onto a concrete floor without cracking it?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

You have two bottles of pills marked with labels A and B. The pills are identical. The doctor has asked you to take one A pill and one B pill daily. You cant take more or less than that.

While taking out the pills one day, you took out one pill from A and by mistake took out two from B. You have no idea which pill is which now.

You cant throw away the expensive pills. What will you do now?

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

The product of three consecutive numbers is 7980.
Then the sum of these consecutive numbers would be?

Cristina was born in 1888. She just had her 30th birthday today how did that happen?

Paul's height is six feet, he's an assistant at a butcher's shop and wears size 9 shoes. What does he weigh?

Why is the Hole below a Lock?