Table:
0
A
B
C
D
E
1
Country ( exonym )
Capital ( exonym )
Country ( endonym )
Capital ( endonym )
Official or native language(s) (alphabet/script)
2
Iceland
Reykjavík
Ísland
Reykjavík
Icelandic
3
Indonesia
Jakarta
Indonesia
Jakarta
Bahasa Indonesia
4
Iran
Tehran
Īrān ایران
Tehrān تهران
Persian ( Arabic script )
5
Iraq
Baghdad
Al-'Iraq العراق Îraq
Baghdad بغداد Bexda
Arabic ( Arabic script ) Kurdish
6
Ireland
Dublin
Éire Ireland
Baile Átha Cliath Dublin
Irish English
7
Isle of Man
Douglas
Isle of Man Ellan Vannin
Douglas Doolish
English Manx

Questions and formulas:
Question: What is the capital (endonym) where Douglas is the Capital (exonym)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="Douglas"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,B2:B7="Douglas"),4))
Level: medium
Question: How many countries (endonym) has the capital (endonym) of Jakarta?
Formula: ROWS(UNIQUE(FILTER(C1, D1="Jakarta")))
Formula2: ROWS(UNIQUE(FILTER(C2:C7, D2:D7="Jakarta")))
Level: medium
Question: What is the country (exonym) where the official or native language(s) (alphabet/script) is Icelandic?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Icelandic"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,E2:E7="Icelandic"),1))
Level: medium
Question: In which country (endonym) is Irish English the official or native language(s) (alphabet/script)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="Irish English"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,E2:E7="Irish English"),3))
Level: medium
Question: Which country (exonym) is the country (endonym) isle of man ellan vannin?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Isle of Man Ellan Vannin"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E7,C2:C7="Isle of Man Ellan Vannin"),1))
Level: medium