A large container is kept in open under the rain. Every passing hour, the water collected inside the container becomes double what it was.

In ten hours, the container is filled completely. Can you calculate how long would it have taken to be filled in half?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Can you solve this picture maths equation?

What is the next number in this series?

4,12,84,3612....

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

What is black when you buy it, red when you use it, and gray when you throw it away?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

The person who makes it has no need for it; the person who buys it has no use for it. The person who uses it can neither see nor feel it. What is it?

In one of the popular batman series movie "Batman Forever", there was a riddle that goes like "Tear me off and then scratch my head and I was red then and now I am back. Who am I?

Spot what is wrong here in below Picture?