I am taken from a mine and shut up in a wooden case, from which I am never released, and yet I am used by almost every person. What am I?

It's a test that will check your IQ.

Suppose you have one 11 minute hourglass and one 13 minute hourglass.

Can you measure exactly fifteen minutes using them ?

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.

What does this simple rebus mean?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!

They are the five precious gems of an everyday sort and all can be found on a Tennis Court. Who are they?

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see? What is it?

A car is crossing a 20 km-long bridge. The bridge can support at most 1500kg of weight over it. If somehow, the weight on the bridge becomes more than that, it will break.

Now, the weight of the car is exactly 1500kg. At the midway, a bird comes and sits on the roof of the car. This bird weighs exactly 200 grams.
Can you tell if the bridge breaks at this point or not?

This is a picture puzzle. You have to guess the name of the movie that can be related to the picture.

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?