A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

Our product and our sum always give the same answer. Who are we?

Yesterday I fell from 30 feet high ladder but I don't get hurt. Why?

Two guards were guarding the camp.Guard-1 was looking towards the south to make sure no threat is coming from the road.Guard-2 was looking at the north to make sure no threat is coming from the top. Suddenly Guard-1 ask the Guard-2 why he is smiling?How Guard-1 knows that Guard-2 is smiling?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

There is a certain crime, that if it is attempted, is punishable, but if it is committed, is not punishable. What is the crime?

You throw me out when you want to use me and you take me in when you don't want to use me.

Who Am I?

I am a seven-letter word but if you remove four of my letters I will have one left. What word am I?

I have two sand hourglasses:
1. A 7 minute one and
2. An 11-minute one.

Using just these 2 sand hourglasses, how can I measure time as 15 minutes?