Can you place six X (crosses) in below board without making three in a row in any way ?

What number do you get when you multiply all of the numbers on a telephone's number pad?

A man was just doing his job when his suit was torn. Why did he die three minutes later?

I have lakes with no water, mountains with no stone and cities with no buildings. What am I?

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

There are three light switches outside a room. One of the switches is connected to a light bulb inside the room.
Each of the three switches can be either 'ON' or 'OFF'.

You are allowed to set each switch the way you want it and then enter the room(note: you can enter the room only once)

Your task is to then determine which switch controls the bulb?

What is more useful when it is broken?

why number 8549176320 is one of a kind?

Do you know who was buried in John's tomb?

Can you count the number of blocks in the picture below?