[MichaelGG]

Can you explain how the birthday paradox applies here?

Just looking at it simply, if you can solve 15.8 of 180, that means that for any given test you should have an 8.77% chance of solving it (6 tests for > 50%). What am I doing wrong?

Also, it looks like some of the other questions are easy to automate. Like "how many letters are in the word 'whatever'".

[baddox]

A Birthday Attack relies on the fact that even for some rare events (such as two random people having the same birthday), when there is a large opportunity to observe the rare event (such as 30 random people in the same room) it's actually quite likely to observe the event.