World Capitals with a Unique First Letter

There are four capital cities that begin with a letter that no others do. Can you name them?
Inspired by this quiz by Devvik2
Try the whole series here
Quiz by HinesBrothers
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Last updated: May 30, 2020
First submittedApril 30, 2020
Times taken2,176
Rating4.25
1:00
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Letter
Continent
Capital
Q
South America
Quito
U
Asia
Ulaanbaatar
I
Asia
Islamabad
Z
Europe
Zagreb
+1
Level 68
Apr 30, 2020
Try the country version here, or Devvik2's state edition!
+1
Level 68
May 4, 2020
+34
Level 75
Apr 30, 2020
The fact that it spells out QUIZ is an amazing coincidence!
+2
Level 82
May 3, 2020
Might be a bit of a challenge without the continent clues. There's only 12 countries in S. America
+4
Level 68
May 3, 2020
I still like them. On the World Capitals A-Z quiz, these four capitals are each guessed about 45% of the time, which might be a bit too difficult. Anyways, not every quiz has to be hard.
+1
Level 77
May 4, 2020
But it spells quiz!
+1
Level 73
May 4, 2020
Nice one! 5 points in 12 seconds is hard to beat :-)
+1
Level 62
May 5, 2020
I like how you made in order that spells "quiz'
+1
Level 68
May 5, 2020
It was actually the Quizmaster that did that when featuring
+1
Level 62
May 8, 2020
Oh
+1
Level 63
May 7, 2020
That's interesting. The letter "I" was surprising.