What two things can you never eat for breakfast?

You have a three-gallon and a five-gallon measuring device. You wish to measure out four gallons.

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 am a three digit number.
My tens digit is five more than my ones digit.
My hundreds digit is eight less than my tens digit.
What number am I?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Which Burger Is Different in below image?

Can you make the below equation true by using any three numbers from "1, 3, 5, 7, 9, 11, 13 and 15"?

( ) + ( ) + ( ) = 30

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Solve the rebus riddle in the picture below.

Today, I celebrated my 32nd birthday but I was born in 1972.
How is this possible?