Choose a level to begin. Then, enter the largest number of 50K+ population cities you chose in each 5-degree latitude range. Only green ranges contain answers. When you have 2 left to go in a range it will fill in faintly yellow, 1 left it will be orangish, and all done it turns red. A time bonus is given for completing a square (it is greater for higher levels).

hugequiz Premium members will see the top 25 missed cities at the end of the quiz as purple markers.