Table:
0
A
B
C
D
E
1
Name
Style
Opened
Manufacturer
Themed Area
2
The Shock Wave
Standing Up Rollercoaster
1994
Intamin
Action Park
3
G Force
Steel Sit Down
2005
Mauer Söhne
Action Park
4
Ben 10 – Ultimate Mission
Steel Sit Down
2011
Vekoma
Aerial Park
5
Buffalo Mountain Coaster
Steel Sit Down
1987
Zamperla
Aerial Park
6
Troublesome Trucks Runaway Coaster
Steel Sit Down
2008
Gerstlauer
Thomas Land

Questions and formulas:
Question: Which average Opened has a Manufacturer of vekoma?
Formula: AVERAGEIFS(C1,D1,"vekoma")
Formula2: AVERAGEIFS(C2:C6,D2:D6,"vekoma")
Level: easy
Question: Which Opened is the highest one that has a Themed Area of aerial park, and a Manufacturer of zamperla?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(E1="aerial park")*(D1="zamperla")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(E2:E6="aerial park")*(D2:D6="zamperla")),3))
Level: medium
Question: Which Themed Area has a Name of troublesome trucks runaway coaster?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="troublesome trucks runaway coaster"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6="troublesome trucks runaway coaster"),5))
Level: medium
Question: Which Manufacturer has a Style of steel sit down, and an Opened larger than 2008?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(B1="steel sit down")*(C1>2008)),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(B2:B6="steel sit down")*(C2:C6>2008)),4))
Level: medium