Are they saying Canadians are stupid or Americans are WAY too stupid?

So I'm entering this online contest and read the following:

Rules and Conditions:

PRIZES: One (1) Grand Prize of $50,000, three (3) First Prizes of $10,000 and twenty (20) Second Prizes of $1,000. Prizes will be awarded by check in U.S. currency. Canadian winners must correctly answer a time-limited mathematical skill-testing question to be administered by telephone in order to be awarded a Prize.