Table:
0
A
B
C
D
E
F
1
exhibition id
year
theme
artist id
ticket price
2
1
2004
Santa Claus
1
19.95
3
2
2005
Christmas stocking
2
19.95
4
3
2006
Santa Claus and Rudolph the Red-Nosed Reindeer
4
14.95
5
4
2007
Christmas Tree
1
16.95
6
5
2008
Spring
6
29.95
7
6
2009
Summer
3
9.95

Questions and formulas:
Question: How many exhibition are there in year 2005 or after?
Formula: SUM(FILTER(A1, Year(B1)>=2005))
Formula2: SUM(FILTER(A2:A7, Year(B1)>=2005))
Level: easy
Question: Count the number of exhibitions that happened in or after 2005.
Formula: SUM(FILTER(A1, Year(B1)>=2005))
Formula2: SUM(FILTER(A2:A7, Year(B1)>=2005))
Level: easy
Question: Show theme and year for all exhibitions with ticket prices lower than 15.
Formula: CHOOSE({1,2},FILTER(C1,E1<15),FILTER(B1,E1<15))
Formula2: CHOOSE({1,2},FILTER(C2:C7,E2:E7<15),FILTER(B2:B7,E2:E7<15))
Level: medium
Question: What are the theme and year for all exhibitions that have a ticket price under 15?
Formula: CHOOSE({1,2},FILTER(C1,E1<15),FILTER(B1,E1<15))
Formula2: CHOOSE({1,2},FILTER(C2:C7,E2:E7<15),FILTER(B2:B7,E2:E7<15))
Level: medium
Question: Show theme and year for all exhibitions in an descending order of ticket price.
Formula: SORTBY(CHOOSE({1,2},C1,B1),E1,-1)
Formula2: SORTBY(CHOOSE({1,2},C2:C7,B2:B7),E2:E7,-1)
Level: easy
Question: What are the themes and years for exhibitions, sorted by ticket price descending?
Formula: SORTBY(CHOOSE({1,2},C1,B1),E1,-1)
Formula2: SORTBY(CHOOSE({1,2},C2:C7,B2:B7),E2:E7,-1)
Level: easy
Question: the number of exhibitions held since 2005
Formula: SUM(FILTER(A1, Year(B1)>=2005))
Formula2: SUM(FILTER(A2:A7, Year(B1)>=2005))
Level: easy
Question: How many exhibitions have been held since 2005?
Formula: SUM(FILTER(A1, Year(B1)>=2005))
Formula2: SUM(FILTER(A2:A7, Year(B1)>=2005))
Level: easy
Question: Themes and dates of exhibitions that cost less than 15.
Formula: LET(a,HSTACK(C1,B1,A1),b,A1,c,CHOOSECOLS(LET(query1,SUMMARIZE(A1,SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,2)<15)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Formula2: LET(a,HSTACK(C2:C7,B2:B7,A2:A7),b,A2:A7,c,CHOOSECOLS(LET(query1,SUMMARIZE(A2:A7,SUMX(E2:E7)),FILTER(query1,CHOOSECOLS(query1,2)<15)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Level: hard
Question: themes and years of any exhibitions with ticket price under 15
Formula: LET(query1,SUMMARIZE(HSTACK(C1,B1,A1),SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,4)<15))
Formula2: LET(query1,SUMMARIZE(HSTACK(C2:C7,B2:B7,A2:A7),SUMX(E2:E7)),FILTER(query1,CHOOSECOLS(query1,4)<15))
Level: hard
Question: exhibitions and their themes ordered by total ticket prices from high to low 
Formula: SORT(SUMMARIZE(HSTACK(A1,C1),SUMX(E1)), 3, -1)
Formula2: SORT(SUMMARIZE(HSTACK(A2:A7,C2:C7),SUMX(E2:E7)), 3, -1)
Level: hard
Question: How many exhibitions since 2005?
Formula: SUM(FILTER(A1, Year(B1)>=2005))
Formula2: SUM(FILTER(A2:A7, Year(B1)>=2005))
Level: easy
Question: The years and themes of the exhibitions with ticket prices lower than 15.
Formula: LET(query1,SUMMARIZE(HSTACK(C1,B1,A1),SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,4)<15))
Formula2: LET(query1,SUMMARIZE(HSTACK(C2:C7,B2:B7,A2:A7),SUMX(E2:E7)),FILTER(query1,CHOOSECOLS(query1,4)<15))
Level: hard
Question: the theme and year of each exhibition whose ticket price is under 15
Formula: LET(a,HSTACK(C1,B1,A1),b,A1,c,CHOOSECOLS(LET(query1,SUMMARIZE(A1,SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,2)<15)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Formula2: LET(a,HSTACK(C2:C7,B2:B7,A2:A7),b,A2:A7,c,CHOOSECOLS(LET(query1,SUMMARIZE(A2:A7,SUMX(E2:E7)),FILTER(query1,CHOOSECOLS(query1,2)<15)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Level: hard
Question: the total ticket prices from high to low for exhibitions with their themes over years.
Formula: SORT(SUMMARIZE(HSTACK(A1,B1,C1),SUMX(E1)), 4, -1)
Formula2: SORT(SUMMARIZE(HSTACK(A2:A7,B2:B7,C2:C7),SUMX(E2:E7)), 4, -1)
Level: hard