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?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

There are 3 apples in the basket and you take away 2. How many apples do you have now?

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

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

What is the difference between a jeweller and a jailer?

A detective visits his friend John just to discover that John's neighbour Dr Jacob was murdered. Dr Jacob, who is a mathematician wrote the murderer's name in a code word "Hcqtfz". There were five suspects
1. Ajit
2. Pankaj
3. Ganpat
4. Deenu
5. Hariya

The Detective was instantly able to find the murderer.
Can you?

There was a blind man. He had four socks in his drawer either black or white. He opened it and took out two socks. Now the probability that it was a pair of white socks is 1/2.

Can you find out the probability that he had taken out a pair of black socks ?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?