If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

There was once a college that offered a class on probability applied to the real world. The class was relatively easy, but there was a catch. There were no homework assignments or tests, but there was a final exam that would have only one question on it. When everyone received the test paper it was a blank sheet of paper with a solitary question on it: 'What is the risk?'.Most students were able to pass, but only one student received 100% for the class! Even stranger was that he only wrote down one word!
What did he write?

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

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

I am the largest in my family of fifty.
The youngest of our family lives separately from the rest of the family and so do I.
I am regarded as harsh and tough.
I am so large, you cut me in two equal halves,
each half would still be larger than the second largest member of the family.
Who am I?

Can you find the missing piece of the Porsche?

I have cities, but no houses. I have mountains, but no trees. I have water, but no fish. What am I?

I am an eight letter word and I am a computer terminology.
The second, third and fourth letters make an animal.
The fourth, fifth, sixth, seventh and eighth letters make a weapon.
The first, second, third and fourth letters can be taken as an outcome of any exam.
The fifth, sixth, seventh and eighth letter combine to form a high end typing software.

Can you tell who am I ?

What kind of band never plays music?