You have to put a letter on the following to make it a meaningful word. The only challenge is that you can't use 'E'.

S E Q U E N C _

The more of this there is, the less you see. What is it?

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 below

21 32 54 87 131 ?

Can you place six X (crosses) in below board without making three in a row in any way ?

Why do we preferably have round manhole covers and not square ones?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Akbar called Birbal and asked him to draw a line on the floor. He asked Birbal to make that line smaller without erasing it. Birbal smiled and did it before Akbar could blink his eyes.

How did he managed to do it?

I am something people love or hate. I change peoples appearances and thoughts. If a person takes care of them self I will go up even higher. To some people I will fool them. To others I am a mystery. Some people might want to try and hide me but I will show. No matter how hard people try I will Never go down. What am I?

Find three numbers such that

* When we multiply three numbers, we will get the prime numbers.
* The difference between the second and the first number is equal to the third and second.