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

Move four matchsticks to the below square to form three squares?

What can you see in the middle of March and April that you can never see in any other month?

What can you deduce from the following BrainBat?

CRY
LMKI

In front of you, there are 9 coins. They all look absolutely identical, but one of the coins is fake. However, you know that the fake coin is lighter than the rest, and in front of you is a balance scale. What is the least number of weightings you can use to find the counterfeit coin?

what does this picture(rebus) riddle means ?

Which word is least like the others? Third, fourth, fifth, sixth, seventh, eighth, ninth?

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?

If you drop me I’m sure to crack, but give me a smile and I’ll always smile back. What am I?

Can anyone tell me a word in the English dictionary which has a silent 'z'?