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50 Longest Rivers in the World

Every time you guess an answer, you will be shown one letter from each of the 9 answers below (the 2nd letter of the answer below, the 3rd of the answer 2 places below etc). This means that reading 'diagonally' (going up-right, starting from the answer above the one you're looking for) letters of the same colour as the rank number you'll be able to get a good hint (but not the initial letter!).
Answers from Wikipedia
Length shown in km
Quiz by scambigol
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Last updated: November 5, 2015
First submittedNovember 5, 2015
Times taken847
Rating4.71
6:00
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Rank
Length
River
Letters of other answers
1
6,650
Nile
m n s s w . . . .
2
6,400
Amazon
a s i o . . . . .
3
6,300
Yangtze
i n l . á . . . .
4
6,275
Mississippi
e l . n . . . . .
5
5,539
Yenisei
e . a o . . . e .
6
5,464
Yellow
b r g . . . i . .
7
5,410
Ob
a n r . g z . . .
8
4,880
Paraná
o u a n n . . s .
9
4,700
Congo
m n o e . . n . A
10
4,444
Amur
e k k r y i . - .
11
4,400
Lena
e c e a t . l . .
12
4,350
Mekong
a g r n . a . . .
13
4,241
Mackenzie
i r a a . a . . .
14
4,200
Niger
u c g t r . . . i
15
3,672
Murray
o l t i . . . c .
16
3,650
Tocantins
o a e s . . n a .
17
3,645
Volga
h d ú n . a y . r
18
3,596
Shatt al-Arab
a r o s r r . w e
19
3,380
Madeira
u k u F a n a d g
20
3,211
Purús
u d . D e L n n r
21
3,185
Yukon
n o . e . a u t .
22
3,180
Indus
ã r w t r T u . .
23
3,180
São Francisco
y l n G . p . . .
24
3,078
Syr Darya
a i . r a . . . .
25
3,060
Salween
a o e m e i . . .
Rank
Length
River
Letters of other answers
26
3,058
Saint Lawrence
i w h b z . a . .
27
3,057
Rio Grande
o a u e y i . a .
28
2,989
Lower Tunguska
r n b u a . y . .
29
2,948
Brahmaputra
a m y u s r . . .
30
2,888
Danube
a l g e a . . . .
31
2,693
Zambezi
i a g D á . y . .
32
2,650
Vilyuy
r n . r n a . o .
33
2,627
Araguaia
a u u o u . y . .
34
2,620
Ganges
m p s g a a . . .
35
2,620
Amu Darya
a l a m m . . . .
36
2,615
Japurá
e r y o . . . . .
37
2,570
Nelson
a l c n . . . . .
38
2,549
Paraguay
o l u m . . s . .
39
2,513
Kolyma
i t i á . a o . .
40
2,500
Pilcomayo
a h u . s d . . .
41
2,490
Katun
s r l n a k . . .
42
2,450
Ishim
u a a r o r . .
43
2,410
Juruá
r k o y e . .
44
2,428
Ural
r l n p . .
45
2,348
Arkansas
o e e n i
46
2,333
Colorado
l i a g
47
2,292
Olenyok
n d n
48
2,287
Dnieper
l a
49
2,273
Aldan
b
50
2,270
Ubangi
+1
level 60
Nov 5, 2015
In the previous version, you lapped around (e.g. for Ubangi you would put N M N S S O . .)
+1
level 71
Nov 6, 2015
True but this time I thought you should manage to find the first one with no hints, the second with just one letter hint etc
+2
level 70
Dec 23, 2016
I was a little confused by the fact that tributaries that are the farthest source of a system, such as the Missouri and Irtysh, are not considered, while other tributaries are. I realized this with about 1:15 left and then started typing tributaries as quickly as possible.
+1
level 49
Aug 8, 2018
Yes, why are Purús and Madeira counted whereas Missouri is not?