Twice ten are six of us,

Six are but three of us,

Nine are but four of us;

What can we possibly be?

Would you know more of us?

Twelve are but six of us,

Five are but four, do you see?

What are we?

A girl was sitting in her hotel room when she heard a knock on the door. She opened the door and found that a man was standing outside.
The man said, "Oh! I am really sorry, I thought this was my room."
He then walked through the corridor to the elevator. The girl did not know the man. She closed her door and called security asking them to apprehend the man.
What made her suspicious of that man? He might have been genuinely mistaken.

A man was found murdered on Sunday morning. His wife immediately called the police. The police questioned the wife and staff and got these alibis: The Wife said she was sleeping. The Cook was cooking breakfast. The Gardener was picking vegetables. The Maid was getting the mail. The Butler was cleaning the closet. The police instantly arrested the murderer. Who did it and how did they know?

In particular commonwealth games, a female participant won silver and gold medals for a single event.

How can this be possible?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

I was speeding and ran through a stop sign, yet two traffic officers who were there do nothing about it.

why?

A chess tournament is taking place on knock-out terms (the one who loses the match is out of the game).
(a) If 10 matches are played in total, how many players participated?
(b) If 20 players took part in the tournament, how many matches were played?

Identify the next two numbers in this series.

101, 112, 131, 415, 161, 718, ???, ???

Find the next number in the series?
2, 12, 36, 80, 150, 252, 392, _ ?

What will you call your mother's brother's brother-in-law?