Table:
0
A
B
C
D
E
1
competition id
year
theme
host city id
hosts
2
1
2013
Carnival M is back!
1
Miley Cyrus Jared Leto and Karen Mok
3
2
2006
Codehunters
2
Leehom Wang and Kelly Rowland
4
3
2005
MTV Asia Aid
3
Alicia Keys
5
4
2004
Valentine's Day
4
Vanness Wu and Michelle Branch
6
5
2003
MTV Cube
5
Shaggy and Coco Lee
7
6
2002
Aliens
5
Mandy Moore and Ronan Keating

Questions and formulas:
Question: What are the hosts of competitions whose theme is not "Aliens"?
Formula: FILTER(E1,C1<>"Aliens")
Formula2: FILTER(E2:E7,C2:C7<>"Aliens")
Level: easy
Question: Return the hosts of competitions for which the theme is not Aliens?
Formula: FILTER(E1,C1<>"Aliens")
Formula2: FILTER(E2:E7,C2:C7<>"Aliens")
Level: easy
Question: What are the themes of farm competitions sorted by year in ascending order?
Formula: SORTBY(C1,B1,1)
Formula2: SORTBY(C2:C7,B2:B7,1)
Level: easy
Question: Ids and hosts for non-aliens themed competitions
Formula: LET(query1,FILTER(A1:E1,C1<>"aliens"),UNIQUE(CHOOSECOLS(query1,5,1)))
Formula2: LET(query1,FILTER(A2:E7,C2:C7<>"aliens"),UNIQUE(CHOOSECOLS(query1,5,1)))
Level: hard
Question: Non-aliens competition ids and hosts.
Formula: LET(query1,FILTER(A1:E1,C1<>"aliens"),UNIQUE(CHOOSECOLS(query1,5,1)))
Formula2: LET(query1,FILTER(A2:E7,C2:C7<>"aliens"),UNIQUE(CHOOSECOLS(query1,5,1)))
Level: hard
Question: Ids and themes for competitions in chronological order
Formula: SORT(UNIQUE(HSTACK(C1,A1,B1)), 3, 1)
Formula2: SORT(UNIQUE(HSTACK(C2:C7,A2:A7,B2:B7)), 3, 1)
Level: medium
Question: Ids and themes for competitions from earliest to latest.
Formula: SORT(UNIQUE(HSTACK(C1,A1,B1)), 3, 1)
Formula2: SORT(UNIQUE(HSTACK(C2:C7,A2:A7,B2:B7)), 3, 1)
Level: medium