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 word is pronounced the same if you take away four of its five letters?

How many words can a pen with half refill write?

When is the top of a mountain similar to a savings account?

A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?

Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

what's the probability of getting a king or a queen from a pack of 52 cards?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

The picture shows the dice results in each couple of throws. If they are actually following a pattern, can you find out the missing one?

In a competitive exam, each correct answer could win you 10 points and each wrong answer could lose you 5 points. You sat in the exam and answered all the 20 questions, which were given in the exam.
When you checked the result, you scored 125 marks on the test.

Can you calculate how many answers given by you were wrong?