We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

what's the probability of getting a king or a queen from a pack of 52 cards?

Can you spot the hidden girl in the picture below?

Luis Garavito killed Density x Volume.

Who is Luis Garavito ?

One is to three as three is to five and five is to four and four is the magic number.
What is the pattern?

Find the value of "?" in the ball picture Riddle below:

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

If you drop a 15 kg iron bar and a 5 kg bag of cotton from a height of 50 meters which will reach the ground first?