Table:
0
A
B
C
D
E
1
City
Country
IATA
ICAO
Airport
2
Krasnodar
Russia
KRR
URKK
Pashkovsky Airport
3
Moscow
Russia
VKO
UUWW
Vnukovo International Airport
4
Rostov-on-Don
Russia
ROV
URRR
Rostov-on-Don Airport
5
Saint Petersburg
Russia
LED
ULLI
Pulkovo Airport
6
Samara
Russia
KUF
UWWW
Kurumoch International Airport
7
Sochi
Russia
AER
URSS
Sochi International Airport
8
Yerevan
Armenia
EVN
UDYZ
Zvartnots International Airport

Questions and formulas:
Question: Which country has an IATA of EVN?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="evn"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,C2:C8="evn"),2))
Level: medium
Question: What is the name of the airport located in Russia with an IATA of AER?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="russia")*(C1="aer")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(B2:B8="russia")*(C2:C8="aer")),5))
Level: medium
Question: What is the name of the airport located in Russia with an IATA of KRR?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="russia")*(C1="krr")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(B2:B8="russia")*(C2:C8="krr")),5))
Level: medium
Question: What is the name of the airport with an ICAO of ULLI?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1="ulli"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,D2:D8="ulli"),5))
Level: medium
Question: What is the ICAO for the destination in Armenia?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="armenia"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,B2:B8="armenia"),4))
Level: medium
Question: What is the name of the airport with an IATA of KUF?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="kuf"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,C2:C8="kuf"),5))
Level: medium