If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

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?

John is 45 years older than his son Jacob. If you find similarities between their ages, both of their ages contain prime numbers as the digits. Also, John's age is the reverse of Jacob's age.

Can you find their ages?

Replace the question mark in the picture below.

How many times can you subtract the number two from the number fifty?

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?

I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

What does below Rebus mean ?

esgg sgeg gegs gsge

What has many teeth, but cannot bite?

My cousin lives in one story house in Antarctica. His house is made the of-of sandstone. what is the color of stairs?