Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Why is the Hole below a Lock?

I cannot talk, but I always reply when spoken to. What am I?

A bomb goes off.
Carnage.
One person, only a few feet away, survives! How can this be?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

A man had five children. He had $100 with him to give to his children. He decided to start with the youngest child and then give $2 more than each younger child to his next elder child.

For example, if he gives $x to the youngest child, he will give $(x+2) to the next one, $[(x+2) + 2] to the next one and so on.

Can you find out how much did the youngest one receive?

How can you throw a ball as hard as you can and have it come back to you even if it doesn't hit anything there is nothing attached to it and no one else catches or throws it.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

On a charity event in Russia, Murray beat Djokovic by winning six games and losing three games.
Note: There is a total of 5 service breaks(one who serve lost the game).
Who served first, Djokovic or Murray?

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?