How can a man go eight days without sleep?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

I have one of the three numbers: 1, 2, or 3 in my mind. I speak only truth. You can ask me just one question for which I will only reply in yes or no or don't know. What question will you ask from me so that you are able to know the number?

Solve the puzzle by telling what does below picture means.

Four children having five rocks each were playing a game in which they had to throw the rock at a particular solid area in the water. Child 1- Succeeded in throwing three rocks at a solid area but one of the rocks sunk. Child 3 - His aim was so bad that all rocks got sunk. Child 4- He was awesome and none of the rocks got sunk. Child 2 - Was the winner but was struck by a rock in the head and died. Who killed Child 2?

John was drowned by he was not wet. How?

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

The following question it puts forth you:

25 - 55 + (85 + 65) = ?

Then, you are told that even though you might think it's wrong, the correct answer is actually 5!

Whats your reaction to it? How can this be true?

With the help clues provided in the image, can you find the 5 digit key?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.