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

I cannot talk, but I always reply when spoken to. What am I?

Why is the Hole below a Lock?

You have two buckets of 11 liters and 6 litres.
How can you measure exactly 8 litres?

John was so frustrated to be the suspect of being a sleeper terrorist that he shoot himself right between the eyes with a revolver in his toilet. The revolver and the bullets were accurate. Minutes later John walks out of the toilet unharmed.
How can this be possible?

There is a square of a particular number which when doubled, becomes 7 more than its quarter.

Can you find the number?

What can run but never walks, has a mouth but never talks, has a head but never weeps, has a bed but never sleeps?

In the following picture, E is going to slide the object down and as per the terrain and the physics, the round object is going to travel all the way till the end. Now, can you analyze who all people will die when it happens?

If,

6 / 7 = 2
3 / 9 = 7
8 / 2 = 6

Then

4 / 5 = ?

At a party, there are five people and a whole round cake lying at the centre of the table. Only four people will make a cut and take their piece and the last one will get the remaining piece on the table. How can they make sure that everyone gets a 1/5th of the piece?