Table:
0
A
B
C
D
E
1
Airline
IATA
ICAO
Callsign
Commenced operations
2
Jetstar Asia Airways
3K
JSA
JETSTAR ASIA
2004
3
Scoot
TZ
SCO
SCOOTER
2012
4
SilkAir
MI
SLK
SILKAIR
1976
5
Singapore Airlines
SQ
SIA
SINGAPORE
1947
6
Singapore Airlines Cargo
SQ
SQC
SINGCARGO
2001
7
Tiger Airways
TR
TGW
GO CAT
2003
8
Valuair
VF
VLU
VALUAIR
2004

Questions and formulas:
Question: Which Callsign has an IATA of tr?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="tr"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,B2:B8="tr"),4))
Level: medium
Question: Which Commenced operations have an Airline of valuair?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="valuair"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="valuair"),5))
Level: medium
Question: Which Commenced operations have an Airline of valuair?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="valuair"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="valuair"),5))
Level: medium
Question: Which IATA has a ICAO of slk?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="slk"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,C2:C8="slk"),2))
Level: medium