There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

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.

No matter how little or how much you use me, you change me every month. What am I?

What goes up but never comes down?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

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 make the following equation true by drawing only one straight line: 5+5+5=550 ?

By removing one matchstick and adding one matchstick, can you convert the word "ZOO" to an animal name?

You are given four results as below:
1111 = F
2222 = E
3333 = T
Then, can you find out how to code 4444?