| @jmujeff90: Both spellings are correct; "spelt" is more common in British English and "spelled" is more common in American English. As for the actual quiz, it's about time someone made one of these, and I think the categories were chosen well... though with the European rivers and Chinese cities, you could pick any arbitrary cutoff between the 4th and 5th highest values in that category, and it would still boil down to "name the top 4", rather than naming something that exists exclusively as a foursome. |