Look at this sequence from top to bottom. What is the next number in the sequence?
1
11
21
1211
111221
312211

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?

By adding four matchsticks, can you divide the square shown in the picture into two equal parts?

You are given a set of weighing scales and 12 marbles. The scales are of the old balance variety. That is, a small dish hangs from each end of a rod that is balanced in the middle. The device enables you to conclude either that the contents of the dishes weigh the same or that the dish that falls lower has heavier contents than the other. The 12 marbles appear to be identical. 11 of them are identical, and one is of a different weight. Your task is to identify the unusual marble and discard it. You are allowed to use the scales three times if you wish, but no more. Note that the unusual marble may be heavier or lighter than the others. You are asked to both identify it and determine whether it is heavy or light

A doctor and a boy were fishing. The boy was the doctor’s son, but the doctor was not the boy’s father. Who was the doctor?

What kind of tree can you carry in your hand?

Why Aeroplane windows are round?

A car key is hidden in the picture. Can you spot it.? Quickly test your eye power now!

I organized a small get together at my home.
In the party , i have a barrel with some whiskey in it.

Suddenly Guest 1 say 'I bet this barrel of whiskey is more than half full'.
'No, it's less than half full' Guest 2 replied.

I don't have any measuring instrument and without removing whiskey from it , how can i determine which of the guest is right ?

Can you find out who is the kidnapper in below Picture and why, Explain ?