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 have an eye but still cannot see.

Who am I?

It walks on 4 when its young, walks on 2 when it's older, and walks on 3 when its very old?

Two fathers and two sons went fishing one day. They were there the whole day and only caught 3 fish. One father said, that is enough for all of us, we will have one each. How can this be possible?

Two batsman each on 94 runs. Seven runs needed to win in last 3 balls. Both make 100*. How?

A King wants to send the diamond ring to his girlfriend securely. He got multiple locks and their corresponding keys. His girlfriend does not have any keys to these locks and if he sends the key without a lock, the key can be copied in the way. How can King send the ring to his girlfriend securely?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Which fur should we be getting from the Lion?

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?

What number do you get when you multiply all of the numbers on a telephone's number pad?