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?

Can you tell a 3D object that has just two surfaces?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

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

Which tank will fill first?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

What is the fastest way to double your money?

Decode the below four famous ciphers:

8P of the SS
1M of the E
1S of the SS
60M in 1H

A word I know has six letters it contains, remove one letter and 12 remain. What is it?