Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Which tank will fill first?

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

What you cannot hold but it is yours?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

Using Only Five 5's and any mathematical operator make sum as 37

Role Action
Block Prevents the target player from acting
Redirect Change target player target.
Save Protects the target player from death.
Seer Sees all actions that occurred
Murderer Kills the target player

The following five players are playing:

Andy
Brian
Chris
Daniel
Fred

You are Andy the Seer and you saw the following things:
a) Brian was redirected to Chris.
b) Chris was blocked.
c) Daniel was killed.

Who is the murderer then?

John went to meet his friend Jacob, but when he was about to reach the main gate, John notices that Jacob had a mighty dog who was fastened to the tree. The chain is long enough that it allows the dog to reach the main gate.

How can the John reach the main gate?

What do you see in the image below

How can one talk without saying a single word?