Five Biggest Cities By Time Zone

I give you a time zone, and you must name the 5 biggest cities in each one according to their metropolitan population.
According to citypopulation.de, March 2015
I've included the Ruhr area, as it has no central city, but rather a collection of medium sized cities.
Quiz by relessness
Rate:
Last updated: March 26, 2015
First submittedMarch 26, 2015
Times taken370
Rating4.00
Report this quizReport
5:30
Enter city here
0
 / 49 guessed
The quiz is paused. You have remaining.
Scoring
You scored / = %
This beats or equals % of test takers also scored 100%
The average score is
Your high score is
Your fastest time is
Keep scrolling down for answers and more stats ...
UTC+0
London
Abidjan
Accra
Casablanca
Dakar
 
UTC-6
Mexico City
Chicago
Dallas
Houston
Guadalajara
UTC+8
Guangzhou
Shanghai
Manila
Beijing
Shenzhen
 
UTC+3
Moscow
Baghdad
Riyadh
Khartoum
St. Petersburg
UTC+1
Lagos
Paris
Kinshasa
Madrid
Ruhr Area
 
UTC-3
São Paulo
Buenos Aires
Rio de Janeiro
Santiago
Belo Horizonte
UTC-5
New York City
Lima
Bogotá
Washington
Boston
 
UTC+2
Cairo
Istanbul
Johannesburg
Alexandria
Ankara
UTC+9
Tokyo
Seoul
Osaka
Nagoya
Busan
 
UTC-8
Los Angeles
San Francisco
Seattle
San Diego
Vancouver
+1
Level 73
Mar 26, 2015
Great quiz!

BuenoS aires is missing an S.

Also, why not sort the columns so they go 'from west to east'?

+1
Level 47
Mar 26, 2015
Thanks! fixed now

I didn't want to do it like that because I thought it would make it easier, because then all the cities American cities would be together. This way I hoped you would have to work out where the time zone was first. But if people don't like it I'll re-order it.

+1
Level 60
Mar 26, 2015
no, it's great like this!
+1
Level 67
Mar 26, 2015
That doesn't make it harder because you still have the numbers. What makes this quiz hard (too hard) is that you have so little time. This quiz involves a lot of guessing so you should get more time.
+1
Level 36
Mar 27, 2015
I'm pretty certain Glasgow is more populated than Dakar no?
+1
Level 47
Mar 27, 2015
Glasgow isn't even the second largest city in the UK, and Birmingham only has about 2 million.
+1
Level 80
Mar 27, 2015
Why isn't Toronto on your list -- its slightly larger than Boston at about 6 million
+1
Level 47
Mar 28, 2015
According to my source, citypopulation, Boston has 7.35 million compared to Toronto's 7 million
+1
Level 73
Jan 6, 2016
Great quiz. Got them all with only 10 seconds left.
+1
Level 26
Nov 1, 2017
Extremely fun