Two girls were born to the same mother, on the same day, at the same time, in the same month and year and yet they're not twins. How can this be ?

You are presented with three boxes. One of them has a red ball inside and the other two have a black ball inside each of them. You are asked to pick up the one with red ball and you pick one. Now, one of the other boxes is opened and it is found to have a black ball.

You are presented with a chance to change your box with the one that is left closed. Will you change your box? Why or why not?

Replace the question mark with the correct number.

A prisoner is told: "If you tell a lie, we will hang you and if you tell the truth, we will shoot you." What did the prisoner say to save himself?

10+10 and 11+11 can give you the same answer.

Explain how?

What type of tree can I carry in my hand?

John named his first son Alpha, second Beta, third Charlie and fourth Delta. What is the fifth son's name?

If a wheel has 54 spokes, how many spaces are there between the spokes?

Can it be possible to build a house that has all its four walls facing towards the South?

Look at the picture and find out which square is not linked with any of the other squares.