The answer to the 'famous Honolulu typing school' maths question is WHA-CKA-KEY. The 'joke' is that this sounds like both whack-a-key (what you'd do at a typing school) and Waikiki, a famous beach in Honolulu. You can see questions that lead to the joke at meridianschools.org/LSMS.
If you're looking for other downloadable maths worksheets with similar senses of humor, try cms.cerritos.edu/uploads or pascack.k12.nj.us.
You'll find plenty of Hawaiian jokes at sites like hawaiianjokes.com, jokes4us.com/miscellaneousjokes/worldjokes,
and e-hawaii.com/jokes. Here are a couple of examples:
Q: How do you beat up a lumpia?
A: You pansit
Q: What do you call a MAHU from Micronesia?
A: MicroSoft!