If a shopkeeper can only place the weights on one side of the common balance. For example, if he has weights 1 and 3 then he can measure 1, 3 and 4 only. Now the question is how many minimum weights and names of the weights you will need to measure all weights from 1 to 1000? This is a fairly simple problem and very easy to prove also.

If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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

In two decks of cards, what is the least amount of cards you must take to be *guaranteed* at least one four-of-a-kind?

You are trapped in a room with two doors. One leads to certain death and the other leads to freedom. You don't know which is which.
There are two robots guarding the doors. They will let you choose one door but upon doing so you must go through it.
You can, however, ask one robot one question. The problem is one robot always tells the truth, the other always lies and you don't know which is which.
What is the question you ask?

Something Extraordinary happened on May 6th 19778 at 12:34am what was that?

There are three boxes of different sizes with three cupcakes inside each of the boxes in Christina's kitchen. At night her daughter wakes up and goes to the kitchen. She opens a box and eats all three cakes.

But in the morning Christina finds out that each box still had three cupcakes. How?

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

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Identify the 10 differences between the two given pictures.