Solve below rebus puzzle?

Baseball bat and ball cost $100. If the bat cost $99 more than the ball, what is the cost of each?

What can you hold in your right hand, but never in your left hand?

Living above a star, I do not burn
Eleven friends and they do not turn
I can just be visited in a sequence, not once or repeatedly
PQRS are my initials
Can you tell my name accurately?

Always in you, Sometimes on you;

If I surround you, I can kill you.

What am I?

"That Restaurant always remains crowded. This is the reason why nobody goes there".

Can you find a flaw in this statement?

The centre of the third figure is empty. What digit should fit inside?

Out of the nine cats that you can see in the picture, there are only two that are completely identical. Can you find them out?

The day after tomorrow will be three days before Tuesday. Can you find out what is today?

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?