You begin with two US urban areas shown in the grid. Upon starting, your job is to sort the urban areas in order from largest to smallest by population. The order is represented by the ‘1st’ thru ’16th’ in each box. You can click on a urban area to move it to a higher position in the list – simply click once and it will turn red, then clicked another higher-ranked urban area to position the first urban area before it. Click submit to check your answers…if they are in order you will get a new urban area added to the end which needs to be positioned correctly, and so on until you either get one wrong or complete all 15 levels.

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