On a special event at the prison, 5 prisoners John, Jacob, Krist, Tang, and Dang given a chance to go to a sauna and can bring one thing with them.

Following are the things that the prisoners bring with them.
John: A soda
Jacob: Thermos
Krist: Book named "How to kill"
Tang: A Walkman
Dang: Harmonica

Since it is a Sauna, no one can see each other. After a while When the steam is switched, Tang was found dead and there was blood all around.
J Bond was called and he instantly come to know who can be the murderer. How?

The more it dries, the wetter it becomes. Can you tell what it is?

A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

You have two buckets - one holds exactly 5 gallons and the other 3 gallons. How can you measure 4 gallons of water into the 5 gallon bucket?

(Assume you have an unlimited supply of water and that there are no measurement markings of any kind on the buckets.)

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

What is the next number in this matchsticks series riddle?

What question can you never answer yes to?

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

What word is pronounced the same if you take away four of its five letters?

Replace the letters of words with a number so that the below equation holds true

BASE +
BALL
---------
GAMES
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