What does the following represent?

N N N N N N N

A A A A A A A

C C C C C C C

What are the 50th, 63rd and 100th numbers in the sequence below?
4, 5, 8, 8, 9, 9, 12, 13, 13, 13, 17, 18, ...

A guy in his thirties is found dead in a forest. The shocking thing about the body is that he is wearing his swimming trunks snorkel and a facemask.

For your information, the nearest lake is some 10 miles away and the sea is hundreds of miles away.

How did he die then?

A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Considering the below equation:

V + II - VI = 10
IV - X + VIII = 20
IV - VII + VI = 30

Then, I + II + III = ?

Replace the question mark with the correct number in the below-given picture?

Why is it very easy to weigh a fish?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

Which is the correct shadow of the bird?

How can you drop a raw egg from a height onto a concrete floor without cracking it?