What month of the year has 28 days?

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?

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?

Our product and our sum always give the same answer. Who are we?

I have a head like a cat and feet like a cat, but I am not a cat. What am I?

What is the difference between a jeweller and a jailer?

You are an expert on paranormal activity and have been hired to locate a spirit haunting an old resort hotel. Strong signs indicate that the spirit lies behind one of four doors. The inscriptions on each door read as follows:

Door A: It's behind B or C
Door B: Its behind A or D
Door C: It's in here
Door D: It's not in here

Your psychic powers have told you three of the inscriptions are false, and one is true. Behind which door will you find the spirit?

Can you count the number of triangles in the given figure?

Identify the hidden meaning behind this picture?

There are 2 sand hourglasses.

The small one can measure 5 hours and the large one can measure 7 hours.

How can we measure 16 hours with 2 sand hourglasses running together ?