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

Find the next number in the series

12, 20, 40, 72, 116, 172 ?

What is the word or phrase below?
R | E | A | D

What can you hold in your right hand, but never in your left hand?

In the given picture, in how many ways can you read the word "Tiger"?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

I’m tall when I’m young, and I’m short when I’m old. What am I?

You board a train. The train will have to enter a tunnel soon. You are claustrophobic. Which place is the best for you to sit?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

You are a prisoner sentenced to death. The Emperor offers you a chance to live by playing a simple game. He gives you 50 black marbles, 50 white marbles, and 2 empty bowls. He then says, 'Divide these 100 marbles into these 2 bowls. You can divide them any way you like as long as you use all the marbles. Then I will blindfold you and mix the bowls around. You then can choose one bowl and remove ONE marble. If the marble is WHITE you will live, but if the marble is BLACK... you will die.'

How do you divide the marbles up so that you have the greatest probability of choosing a WHITE marble?