You have a 12 liters jug full of water. You have two empty 8 liters and 5 liters jug. How can you divide the water into two equal parts using these jugs?

how come the second man dies?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

A boy purchased a book from a bookkeeper and gave him $100.
The cost of the book is $50 but the bookkeeper has no change, so he gets the change from the next shop and returns the boy his $50.

After some time the next shopkeeper came with the $100 note and told the bookkeeper that the note was a fraud, so he took the money back.

How much loss did the bookkeeper face?

Why is 6 afraid of 7?

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

I add 5 to 9 and get 2. The answer is correct, so what am I?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?