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?

He does not have any heart but still, He manages to live.
If you kill him, you will eventually die but yet you kill him.
He cannot run, who is He?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

what's the probability of getting a king or a queen from a pack of 52 cards?

A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

Find the next number in the series.
1 10 24 43 67 ?

Teacher ask the student

'Why are you standing on that chair in music class ?'.

what did student replied ?

John can fit six large chocolate boxes or nine small chocolate boxes into a carton. How many cartons will he require to put sixty-six chocolate boxes into?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

There was a strange boy who was born before his father. How can this be possible?