A bridge is about to collapse. There are four people P, Q, R and S on one of the sides. Before the bridge collapses, they want to cross it. Now since the bridge is too weak, it can only stand the weight of two people at a time. Also, it is night time and nothing is visible. They have just one torch with them.

Now P takes one minute to cross the bridge, Q takes two minutes to cross, R takes five minutes to cross and S takes ten minutes to cross.

The bridge will collapse in seventeen minutes. How will they be able to cross the bridge before it collapses?

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.

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99

While house hunting in London, I came across a very good leasehold property Discussing the lease the landlady told me:

'The property was originally on a 99 years lease and two-thirds of the time passed is equal to four-fifths of the time to come. Now work it out for yourself and see how many years are to go!

Remove two matchsticks to make the below equation correct.

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

I have teeth but i don't bite. Who Am I ?

Can you find out the number that should replace the question mark with a valid reason?

The measurement of time, That can't be found on a clock, But can be looked upon on a map.

Who is He ?

What is the riddle which can be asked all day with a different correct answer each time.