Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

A man was gazing through the window of the 23rd floor of the building. He suddenly opened the window and jumped on the other side of the window. On landing on the floor, there was not a sheer mark of injury on him.

How can that be possible if he did not use any kind of parachute and did not land on a soft surface?

There is an English word that can be used up to four times in a row without modifying the spelling and form a valid grammatical sentence.

Do you know what word is that?

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

What is the coolest letter in the alphabet?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

Eight of us go fourth, not back, to protect our king from an attack. What are we?

Can you decipher the below rebus?

PBLUESAISNUERSES

Your mother’s brother’s only brother-in-law is asleep on your couch. Who is asleep on your couch?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?