Solve this riddle by finding the odd one out from the rest.

What does this mean?

CCCCCCC

Give it food and it will live; give it water and it will die.

What number comes next in the series?

5 15 5 18 5 24 14 20 _

Using four sevens (7) and a one (1) create the number 100. Except for the five numerals, you can use the usual mathematical operations (+, -, x, :), root and brackets ()

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

A rubber ball keeps on bouncing back to 2/3 of the height from which it is dropped. Can you calculate the fraction of its original height that the ball will bounce after it is dropped and it has bounced four times without any hindrance ?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

There are three boxes on a table. One of the box contains Gold and the other two are empty. A printed message contains in each box. One of the message is true and the other two are lies.

The first box says "The Gold is not here".

The Second box says "The Gold is not here".

The Third box says "The Gold is in the Second box".

Which box has the Gold?

What Time Should the last watch show in the below figure?