Solve The below Equation:

ALFA + BETA + GAMA = DELTA

I am white when I am dirty, and black when I am clean. 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?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

Imagine you are in a room with no windows or doors. How will you get out?

I have Rs.50 and I spend it in the way as below.

What does the below mathematical rebus mean?

When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

John Went to the nearby store in a Mall to buy something for her home. Below is the conversation between the two:

John: How much for the one?
Shopkeeper: It is $2
John: How much for the Eleven?
Shopkeeper: It is $4
John: How much for the Hundred?
Shopkeeper: It is $6.

What is John buying?