Three people are in a room. Ronni looks at the Nile. The Nile looks at Senthil. Ronni is married but Senthil is not married. At any point, is a married person looking at an unmarried person? Yes, No or Cannot be determined.

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

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

Why is the Hole below a Lock?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?

Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

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

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

A Detective reviewed the information they had on the case so far.

A lady named 'Caterina' was found shot and they already had a list of suspects - Ankit, Tarun, Harish, Manoj and Manish.
The killer is a fan of challenges him by leaving notes ad various places.
* The first was found in a toilet room.
* The second was found in an art room.
* The third was in a restroom.
* the fourth in an underwater room.
* The fifth at the no-smoking room.

All of the notes read the same thing, 'The clues are where you find the notes.' Yet, nothing was found at any place the notes were.
Detective the genius, immediately solved the case.
Who was the killer?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?