People make me, save me, change me, raise me. What am I?

I have no life, but I can die. What am I?

Be active and find the killer in the picture Riddle below.

What number should come in place of the question mark below?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

If all Goats are Sheep and all Sheep are Deers, are all Deers Goats ?

We have shown you a regular water barrel as below. Without using any measuring device can you check if the barrel is more than half-filled or less than half-filled?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

The answer I give is yes, but what I mean is no. What was the question?