If 1+9+8=1, what is 2+8+9?

Can you find the thief by just looking at the picture below?

Can you make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

What is black when you buy it, red when you use it, and gray when you throw it away?

Why do Chinese men eat more rice than Japanese men do ?

I have teeth but i don't bite. Who Am I ?

Can you make a six-letter word using the letters N, A and B ?

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?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

Jenifer and Jesica are having a conversation.

Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.

You are told that both of them are lying throughout in the conversation. Can you find their respective ages?