Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

Solve the puzzle by telling what does below picture means.

Can you find the thief by just looking at the picture below?

I make two people out of one. What am I?

There was a kingdom in which the king had no heir to take over his thrown. Even the queen was dead and he himself was on the verge of dying. He thought about it and then summoned all of the teenagers. He gave one seed each to all of them and asked them to grow the plant. He announced that the one with the most beautiful plant will become the king/queen of the empire after the death of the king.

After a month, all of them were called. The king looked at all of the plants but announced the girl with an empty pot as the queen of the empire. Why?

A pregnant woman is preparing to name her seventh child. Her children's names so far are Dominique, Regis, Michelle, Fawn, Sophie, and Lara. What will she name her next child -- Jessica, Katie, Abby or Tilly?

What does this rebus riddle means ?

Find three whole, positive numbers that have the same answer when multiplied together as when added together.

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?