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

In a supermarket, there is an intelligent glass pane before a refrigerating unit. This glass pane allows cherries and apples through it but does not allow grapes and Orange to pass through it.

Can you identify the rule that the glass pane is following?

I was born in a small house and I live in it all alone. No windows and no doors have been assigned to my house. The only way I can go out is by breaking through the walls of my house.

Who am I?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

What does this rebus riddle mean?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Can you make four (4) nines (9) equal 100?

I am a type of room you cannot enter or leave. Raised from the ground below, I could be poisonous or a delicious treat. What am I?

How many times in a given day, minutes and hour clock comes in a straight line ?

Which alphabet letter is a question?