If two fifty-foot ropes are suspended from a forty-foot ceiling that is twenty feet apart, how much rope will you be able to steal if you have a knife?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?

Count the number of triangles in the picture below:

What is the centre of gravity?

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?

What is red and smells like blue paint?

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Jenifer is learning to drive her car. She went down a one way lane and in the wrong direction. But she do not break any law.

How come ?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

If,
29 - 1 = 30
9 - 1 = 10
14 - 1 = 15

Based on similar logic, Can you prove that the below algebraic equation is true?
11 - 1 = 10 ?