Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

using four eights (8) and a one (1) and one mathematical symbol , create the number 100

What does this rebus means ?

PROG WORKRESS

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

In a boat, the father of a sailor's son is sitting with the son of the sailor. However, the sailor is not present on the boat.

Can this even be possible?

What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

A crime was committed at baker street. Ibrahim Dakota who was shot in the stomach was the main suspect. Sherlock questioned the suspect. The conversation started as:
Sherlock: What's your story, Ibrahim?
Ibrahim: I was walking around baker street and suddenly a man from the back shot me. I ran as fast as I could to save my life".
Sherlock: That is enough (and ask the police to arrest him).

Why does Sherlock think he is the murderer?