I make two people out of one. What am I?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

Count the number of balls in picture below:

Why do you find that most of the buildings are deprived of the 13th floor?

I start and end with 500 and carry a 5 in my heart. But I require the first letter and the first number to be complete. I am the name of a King.

Who am I ?

Can you identify if it's a murder or a suicide ?

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

In a town, there are four houses located at different distances from each other. Following are the distances:

The third house is 60 meters apart from the first house.
The fourth house is 40 meters apart from the second house.
The third house is 10 meters nearer to the fourth house than it is to the second house.

Can you find out the distance between the fourth and the first house?

First, think of the colour of clouds. Next think the colour of snow. Last, think of the colour of the moon. Now, what do cows drink?

If,

A + B = C
D - C = A
E - B = C

Based on the above equations, find out the answer for:

D + F = ?