Identify the hidden meaning behind this picture?

Can you place six X (crosses) in below board without making three in a row in any way ?

The square root of number 121 is "11". What is the square root of the number "12345678987654321."?

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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

How could a baby fall out of a twenty-story building onto the ground and live?

How many triangles can you find in this given picture?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

Do You See It?

A person is found murdered in his Chamber. When the crime scene is investigated, the Investigator find out that there is a calendar on which the victim has written a few numbers with his blood. The numbers are 4, 11, 11 and 4.

There are four suspects in the murder, John, Jacob, Anna and Lee. Can you find out who is the murderer?