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?

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

1. What does:
TIM JOB
represent?

2. What does:
MO_ _
represent?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

What English word has three consecutive double letters?

You need to move three matchsticks to form three squares. Can you do it?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

Replace the (?) with the correct mathematical signs to make the expression equal to 59.

18 ? 12 ? 4 ? 5 = 59

What can you catch but never throw?

What is the four-digit number in which the first digit is one-third the second, the third is the sum of the first two, and the last is three times the second?