Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Can you identify the famous TV character from the rebus below?

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 bomb exploded in a room full of married couples and no one died. How?

Why Aeroplane windows are round?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Can you place six X (crosses) in below board without making three in a row in any way ?

My friends called me Iron59 because my parents are a chemist and a mathematician. What is my real name?

Can you spot what's wrong with the following sentence?

PETER WAS ANGRY AT
HIMSELF BECAUSE HE
ACCIDENTALLY LEFT THE
THE KEYS TO HIS CAR
AT HIS FRIEND'S HOUSE.

If in a code language, DISTANCE is written as IDTUBECN and DOCUMENT is written as ODDVNTNE, the how will THURSDAY be coded as in the same language?