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?

What is 3/7 chicken, 2/3 cat and 2/4 goat?

What number should come in place of the question mark below?

You bought me for dinner but never eat me. What am I?

Can you make four (4) nines (9) equal 100?

Can you divide the below-given shape into four equal and identical pieces?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

If you had a pizza with crust thickness 'a' and radius 'z', what's the volume of the pizza?

There are a number of books on a shelf. If one book is the 4th from the left and 6th from the right, how many books are on the shelf?

John and his team plan to rob a safe. They got just one chance to break the code else the local police will be informed. Below are clues:
A) Exactly one number is perfectly placed: 9 8 1
B) Everything is incorrect: 9 2 4
C) Two numbers are part of the code of the safe but are wrongly placed: 0 9 3
D) One number is part of the code of the safe but is wrongly placed: 1 4 7
E) One number is part of the code of the safe but is wrongly placed: 7 8 3