Geography in Numbers

Can you name the number that matches these given statements?
Population of cities are in urban area - according to citypopulation.de
Other population numbers are taken from Worldometers.info
Quiz by Aaron197
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Last updated: July 16, 2020
First submittedJuly 16, 2020
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1. Rivers in South America that are over 4000 km in length.
0
19
7
1
There is only Amazon.
2. World population.
8,310,000,000
7,798,000,000
7,157,000,000
8,544,000,000
3. United Nations member states.
196
193
194
195
4. U.S. states that are bigger by area than Rhode Island.
49
50
48
47
5. Countries bordering Germany.
6
8
9
7
6. Countries where Equator runs through their land.
11
23
19
7
7. States in Australia.
6
5
7
8
8. Capitals of South Africa.
4
1
3
2
They are Bloemfontein, Cape Town and Pretoria.
9. Top 100 highest mountains outside Asia.
23
42
5
0
All of them in only 8 Asian countries.
10. Population of Iceland.
912,000
1,200,000
590,000
341,000
11. Official languages of Bolivia.
12
36
49
3
12. Mediterranean islands that are over 10,000 sq km.
13
5
8
2
There are only Sicily and Sardinia.
13. Megacities (cities > 10 million) in China.
10
3
8
5
They are Guangzhou, Shanghai, Beijing, Tianjin and Xiamen.
14. Population of Moscow.
21,000,000
14,000,000
17,000,000
10,000,000
15. Height of Mount Everest.
10,132 m (33,241 ft)
8,848 m (29,028 ft)
9,216 m (30,236 ft)
7,789 m (25,554 ft)
16. Countries with over 100 million population.
14
18
8
11
17. Countries where English is an official language.
82
105
24
58
18. Rivers in Saudi Arabia.
4,210
553
0
70
+1
Level 71
Jul 16, 2020
The population of the world is missing a few zeros.
+1
Level 67
Jul 16, 2020
Fixed.
+1
Level 79
Jul 16, 2020
The explanation on the Rhode Island question seems to be from an earlier version about New Jersey.
+1
Level 67
Jul 16, 2020
I was supposed to be New Jersey, but I changed it.