There is a box in which distinct numbered balls have been kept. You have to pick two balls randomly from the lot.

If someone is offering you a 2 to 1 odds that the numbers will be relatively prime, for example
If the balls you picked had the numbers 6 and 13, you lose $1.
If the balls you picked had the numbers 5 and 25, you win $2.

Will you accept that bet?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

what's the probability of getting a king or a queen from a pack of 52 cards?

A shepherd had 18 sheep, out of which, all but ten died.

Can you tell us how many sheep was he left with?

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!

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you solve the tricky chess rebus puzzle below by ciphering the hidden meaning?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

The world's largest Thanksgiving turkey was on display at a fair. Everyone was admiring it when suddenly a woman ran up and shot the turkey and left. Everyone knew her yet nobody made any attempts to stop or report her. Why?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?