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?

A sundial has the fewest moving parts of any timepiece. Which has the most?

What is the fastest way to double your money?

A man is found dead with a knife in his back When the investigation is done. A chair lays beside him and the forensic team finds moisture around the body.

If he committed suicide, how did he do it?

O_er_t_o_

Complete the missing letters of the given word.

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

You have 10 balls with you. A friend of yours out of nowhere asks you to place those ten balls in five lines such that each of the lines has exactly 4 balls on them. He needs to check your intelligence. Prove him by doing the task.

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

With pointed fangs I sit and wait; with piercing force I crunch out fate; grabbing victims, proclaiming might; physically joining with a single bite. What am I?

Which number should replace the question mark?