Europe City Grid Challenge


Choose a number of cities by typing ‘3’, ‘5’, or ’10’. Then, enter the largest number of 10K+ population cities you chose in each 5-degree grid square. Only green squares contain answers. When you have 2 left to go in a square 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).

Enter '3', '5', or '10' to begin.


  1. For me, it is only the grid/coverage quizzes that don’t work – the survey locks them completely. (The workaround I have found is to open a different type of quiz first, which gets successfully through the survey stage, then afterwards to select the grid/coverage without using the back button) – the problem arises when you try and open a grid/coverage quiz first directly

  2. I don’t seem to be able to play this quiz (or any of the other grid or coverage quizzes) – every time the survey question comes up, none of the options are selectable – even skip survey – even going back and trying the page again just goes to the survey question where none of the answers are selectable

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