GeotchaA geography quiz on a real globe

50 longest rivers of the Indian Ocean basin

50 rivers, each one drawn on a satellite globe. Name it when it lights up, find it when you are given its name, or type every one you can remember in Name all.

Free to play, with no account needed. What you miss comes back for review until it sticks.

The rivers

1. 1Indus3,180 km
2. 2Brahmaputra2,900 km
3. 3Salween2,815 km
4. 4Euphrates2,800 km
5. 5Zambezi2,574 km
6. 6Murray2,530 km
7. 7Ganges2,525 km
8. 8Irrawaddy2,170 km
9. 9Chenab1,974 km
10. 10Tigris1,850 km
11. 11Limpopo1,750 km
12. 12Jubba1,658 km
13. 13Kafue1,577 km
14. 14Sutlej1,500 km
15. 15Murrumbidgee1,488 km
16. 16Darling1,472 km
17. 17Godavari1,465 km
18. 18Krishna1,400 km
19. 19Warrego1,380 km
20. 20Yamuna1,376 km
21. 21Lachlan1,339 km
22. 22Narmada1,315 km
23. 23Chindwin1,207 km
24. 24Shebelle1,130 km
25. 25Ghaghara1,080 km
26. 26Gascoyne978 km
27. 27Chambal960 km
28. 28Karun950 km
29. 29Wambuul Macquarie950 km
30. 30Gomti900 km
31. 31Barwon889 km
32. 32Karkheh870 km
33. 33Bhima861 km
34. 34Mahanadi860 km
35. 35Ganale Dorya858 km
36. 36Ashburton825 km
37. 37Ruvuma800 km
38. 38Tana800 km
39. 39Brahmani799 km
40. 40Murchison780 km
41. 41Son780 km
42. 42Jhelum774 km
43. 43Luangwa770 km
44. 44Kaveri765 km
45. 45Fortescue760 km
46. 46Cuando731 km
47. 47Kosi729 km
48. 48Manjira724 km
49. 49Murat722 km
50. 50Ravi720 km

Length in km as Wikidata records it (P2043, the best-ranked figure). Each named river counts on its own: the river that carries the name, from its source to its mouth. Headstreams and tributaries with names of their own are rivers of their own, so the Missouri and the Mississippi are two rivers here, as are the Irtysh and the Ob (the Longest River Systems set measures such chains as one system, from the most distant source). A named section of a river is that river: the Solimões, as the Amazon’s upper course is called in Brazil, is the Amazon. Where the recorded length runs from a differently named headwater (the Congo’s from the Lualaba’s source), the course is drawn on up that headwater. Rivers under 200 km are in only when they are well known (30 or more Wikipedia editions), and a river whose mapped course covers under half its recorded length is left out. Rivers in Antarctica are left out unless the quiz includes Antarctica. The Indian Ocean basin: every river here whose waters reach the Indian Ocean or a sea, gulf or bay inside it, as the IHO's sea areas nest (the North Sea lies in the Atlantic, the Adriatic in the Mediterranean), directly or through other rivers and lakes, following where Wikidata says each river flows (P403) downstream. Rivers of inland basins (the Caspian Sea, Lake Balkhash) reach no ocean.

On the map

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