Irene killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

f you were running a race, and you passed the person in 2nd place, what place would you be in now?

Here is what you have to do. You have to throw a ball as hard as you can but it must return back to you even if it does not bounce at anything. Also, you have nothing attached to the ball. There is no one on the other end to catch that ball and throw it back at you.

How will you do it?

In the picture, you can see a chess board. On the top left position, the K marks a knight. Now, can you move the knight in a manner that after 63 moves, the knight has been placed at all the squares exactly once excluding the starting square?

Find the next number in the series.
1 10 24 43 67 ?

Can you identify the direction in which this bus is moving; left or right?

Hint: The bus is moving on the roads of London.

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

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?

Find the combined weight of the Cat, Dog and Rabbit in the given picture.

Which is faster, Heat or Cold ? Explain.