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?

You can take four of the five letters out of this word, but the pronunciation never changes. What is the word?

John is looking at Jenifer, but Jenifer is looking at Jacob. John is married, but Jacob is not.

Is a married person looking at an unmarried person ?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Can you solve the below tricky visual equation?

One day, I thought of ways that can be used for creating a palindrome. So I decided that I will turn into a larger number by adding the reversed digits to the original number and keep doing it till I finally obtained a palindrome.

I am not sure if this process will always result in a palindrome eventually but I was able to produce a four-digit palindrome. Can you guess my starting number?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

Sachin bought a car with a strange 5 digit numbered plate.The water image of the number is 78633 more than my car number. All the digits of car number are distinct.

What is the original number on number plate?

John said, "If yesterday was tomorrow, today would be Friday."

When did John make this statement?

Why did Buffon take the goal with him after every Juventus match?