There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

You need to arrange three 7 and mathematical symbols to form number 1?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

There are 20 people in an empty, square room. Each person has full sight of the entire room and everyone in it without turning his head or body, or moving in any way (other than the eyes). Where can you place an apple so that all but one person can see it?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Before Mount Everest was discovered, what was the highest mountain in the world?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?