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Earn +20 ptsQ: What are the 21 megacities?
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How many megacities are there?
As of 2007, there were 18 megacities according to "Living in the Environment, 15th Ed., G. Tyler Miller, Jr." See Chapter 23 on Urbanization and Transportation. It's possible that this information is now considered to be outdated. It should be noted that megacities can alternatively referred to as megalopolises.
What is 21-21 plus 21-21 plus 21?
(21-21)+(21-21)+21 = 0+0+21 = 21
What is the LCM of 21 and 21?
The LCM is 21.
What is 21 divided 21 plus 21 minus 21 plus 21 times 21?
21
What is 5 over 7 minus 5 over 21?
5/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/215/7 - 5/21 = 15/21 - 5/21 = 10/21
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