At a movie theater, the manager announces that they will give a free ticket to the first person in line whose birthday is the same as someone who has already bought a ticket. You have the option of getting in line at any time. Assuming that you don't know anyone else's birthday, that birthdays are distributed randomly throughout the year, etc., what position in line gives you the greatest chance of being the first duplicate birthday?
from http://www.ocf.berkeley.edu/~wwu/riddles/hard.shtml
This reminds me of a problem of the past.
To be honest I couldn't be bothered thinking about how right or wrong this is, but I will guess the answer is 365/e, which is about 134th...
I will laugh if this is at all right...a lot