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?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

I have an eye but still cannot see.

Who am I?

Decode below three cipher riddles:

26 L of the A
7 D of the W
1000 Y in a M

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

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

What is the word or phrase below?
R | E | A | D

What can you deduce from the following BrainBat?

CRY
LMKI

What do you see in the given picture?

If,

20 % 5 = 24

21 % 7 = 33

42 % 6 = 67

Then;

66 % 6 = ?