Type 'easy' or 'hard' to begin the quiz. Easy is a 10-degree grid, hard is a 5-degree grid. Then, try to name the largest Canada cities in each square IN ORDER. To name a city, you must first click on the grid square to make it have a GREEN border. Then, type in the city answer for that square followed by a '.' (a period).
The squares will start with '0/5' (or maybe fewer cities if less exist in that square). Click on a square and enter the largest city in that square not yet answered (so, the largest city if you have yet to answer a city in that square). You will then have '1/5' and need to click on that square to name the 2nd largest city, and so on until you complete all the cities up to 5 (or less if less exist). If you name an incorrect city in a square it becomes 'locked' and turns red and you can no longer accumulate cities in that square.
You receive 1 point for the largest city in a square, 2 for the 2nd largest, and so on.
At the end of the quiz the largest remaining city you haven't named will be shown in each square.
Quiz Takers 
a quiz with all urban areas in the us (regardless of population) would also be fun!
Per the census definitions, here are three metro/urban areas type quizzes:
https://hugequiz.com/quizzes/us-metropolitan-statistical-areas/
https://hugequiz.com/quizzes/us-micropolitan-statistical-areas/
https://hugequiz.com/quizzes/us-combined-statistical-areas/
It would be neat if we could select a specific amount of metro areas like you can with cities with the two hashtags. Like in the US Largest Cities, if you want 347 cities, you’d type #347#. I’d love it if we could do that here.
I had no idea that Concord (and basically the rest of Contra Costa County) was considered its own urban area. I always assumed we were part of the SF-Oakland UA.