joez Challenge #6

You are given ten answers. Can you figure out what they have in common. Give your answer in the comment section along with an explanation
quiz idea = malbaby
challenge #4 still unsolved.
congratulations to WolfCam for solving challenge #5
Quiz by joez
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Last updated: November 5, 2017
First submittedNovember 5, 2017
Times taken4
Average score100.0%
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Hint
Answer
1
Cairo
2
Belem
3
Shanghai
4
New Orleans
5
Krasnoyarsk
6
Jinan
Hint
Answer
7
Omsk
8
Buenos Aires
9
Kinshasa
10
Khabarovsk
Commonality
CORRECT!
+1
Level 64
Nov 5, 2017
I was looking at them, then I realized this is a similar to my 7th challenge! Which nobody has solved, These are all on the longest rivers in the world!
+1
Level 64
Nov 5, 2017
Also if you go solve my seventh challenge now I will count that!
+1
Level 71
Nov 5, 2017
Congratulations! I didn't mean to copy your idea. My dumbed-down version must have been my brain working through some missing pieces in my solution to your quiz.
+1
Level 64
Nov 5, 2017
It's fine! I believe in coincidence!
+1
Level 50
Jun 20, 2022
You ever heard of that crazy coincidence between a Italian king and another Italian person?