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

Why do you find that most of the buildings are deprived of the 13th floor?

Which famous Hollywood movie name is hidden in the below rebus?

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

I know a country, If you remove the last alphabet of its name, it will become a part of your body. Do you name it?

If 5 cats catch 5 mice in 5 minutes, how long will it take one cat to catch a mouse?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

An equation has been laid down using a few matchsticks. However, as you can see, the equation is not correct. Can you correct the equation if you are allowed to add or remove 5 matchsticks?

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

What does below chemistry rebus means?