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

The answer I give is yes, but what I mean is no. What was the question?

A man is found unconscious in front of a store at two in the morning. His head is bleeding and there’s a brick laying next to him. When the police arrive, they carry the man to jail. Why did they arrest him?

Can you find out the remainder when 3^300 is divided by 5?

A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

When 99 is considered higher than 100?

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

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

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

What word is identified by the below rebus?

Your Your Your Your Your
Your Your Your Your Your