When monkey rotate the gear, which mark will be hit 1 or 2 ?

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?

Christina has four daughters, and each of her daughters has a brother. How many children does Christina have?

A train leaves from point A for point B at 80 mph. After half an hour, another train leaves from point B for point A at 60 mph.

Which of the trains will be farther from point A when they meet ?

Can you find out a way through which you can make five squares out of the given figure by moving just six match sticks?

You can hear me, but you can't touch or see me.

What am I?

Take 9 from 6, 10 from 9, 50 from 40, and leave 6.

How Come ??

What jumps when it walks and sits when it stands?

Why is it very easy to weigh a fish?

A Child was born in Lahore, Pakistan. Still, the child is not a Pakistani citizen. why?