You have a thousand Re. 1 coins with you. You have ten bags with you and you can put any number of coins in each of the bags. The condition is that if someone asks you for any amount between 1 and 1000, you must be able to give that amount by just giving the bag (you are not allowed to open the bag and give coins).

How will you do it?

A pond had 60 fish, out of which, all but 20 died.
How many fishes are now present in that pond?

A woman is sitting in her hotel room and hears a knock at the door. She opens the door to see a man whom she’s never met before. He says, “I’m sorry, I have made a mistake, I thought this was my room.” He then goes down the corridor and into the elevator. The woman goes back into her room and calls security. What made the woman so suspicious of the man?

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

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

I make two people out of one. What am I?

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

There are two words one resembles the "state of rest" and the other is related to "writing/reading material".

Can you name these two words which also sound similar?

Transform the word THINK into BRAIN while changing only one letter at a time in a manner that each of the word in the process is a real word!!!