An infinite number of mathematicians are standing behind a bar. The first asks the barman for half a pint of beer, the second for a quarter pint, the third an eighth, and so on. How many pints of beer will the barman need to fulfill all mathematicians' wishes?

I am never scared but became petrified and can’t live in a house but would die to make one. What am I?

John drives to his office at 20km/hr. After reaching the office, he realizes that today is a holiday. He went back at an average speed of 30km/hr. Discounting the time spent in the stoppage what was the average speed of his journey?

Two guards were on duty outside a barracks. One faced up the road to watch for anyone approaching from the North. The other looked down the road to see if anyone approached from the South. Suddenly one of them said to the other, "Why are you smiling?"

How did he know his companion was smiling?

Can you move 2 matchsticks to form four equal sized squares.

How can you drop a raw egg from a height onto a concrete floor without cracking it?

Can you find the key in the picture below?

What demands an answer, but asks no questions

Solve The below Equation:

ALFA + BETA + GAMA = DELTA

How many pluses should we put between the digits of 987654321 to get a total of 99, and where?