Two friends were betting. One said to the other, "The coin will be flipped twenty times and each time the coin lands on the head, I will give you $2 and each time it lands on the tale, you will give me $3." After flipping the coin twenty times not a single penny was exchanged among them.

How many times did the coin land on heads?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

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?

Can you find out what is missing?

1 3 5
2 4 ?

Hint: It's not six. Think out of the box.

The person who makes it has no need for it. He who purchases it does not use it. The person who does use it does not know they are. What is it?

No matter how little or how much you use me, you change me every month. What am I?

When I go in I might cause pain. I cause you to spit and ask you not to swallow. I can fill your hole. What am I?

What is the word or phrase?

A man started to town with a fox, a goose, and a sack of corn. He came to a stream which he had to cross in a tiny boat. He could only take one across at a time. He could not leave the fox alone with the goose or the goose alone with the corn. How did he get them all safely over the stream?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E