What's the only room from which no one can enter or leave

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

By what process could you make a 'Tea-Table' into food?

A plane crashed between the border of Mexico and America. Where do you bury the survivors?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

Can you find out the number of the parking space in which the car is parked?

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

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything