John Huthmaker wrote:

airplane giveaways), their rules stipulate that if the winner is Canadian,
they will have to pass a math test to recieve the prize.

ok, I don't have the reference handy, but last time someone asked
the question, the answer was around the line that Canada has weird
rules about lotteries and such, and for some reasons, the math
tests turns the pure luck based tombola into a contest which then
becomes legal there; no matter how dumb the math test might be, i.e.,
2 + 2? might qualify; any Canadian out there?

--Sylvain