Count the number of balls in picture below:

I’m tall when I’m young, and I’m short when I’m old. What am I?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.

What happened when the wheel was invented?

Identify Me

Hint1: I am a god
Hint 2: I am a planet
Hint 3: measurer of heat

Count the number of lines in the image below ?

If eleven plus two equals one, what does nine plus five equal?

Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?