When can we add 2 to 11 and get 1 as the correct answer?

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

A man in a car saw a Golden Door, Silver Door and a Bronze Door. What door did he open first?

This is a famous paradox which has caused a great deal of argument and disbelief from many who cannot accept the correct answer. Four balls are placed in a hat. One is white, one is blue and the other two are red. The bag is shaken and someone draws two balls from the hat. He looks at the two balls and announces that at least one of them is red. What are the chances that the other ball he has drawn out is also red?

Take one out and scratch my head, I am now black but once was red. What am I?

Find the hidden tiger in the given optical illusion ?

Can you identify if it's a murder or a suicide ?

Once while in his court, King Akbar asked Birbal to write something on a wall that makes one sad when read in good times and makes one happy when read in sad times.

He took only a few moment and wrote something that fit the requirements. What did he write?

In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

How many cubic feet of dirt are in a hole of one foot deep, three feet long, and two feet wide?