Table:
0
A
B
C
D
E
1
entrepreneur id
people id
company
money requested
investor
2
1
1
Umbrolly
150000
Duncan Bannatyne
3
2
2
Grails Ltd
120000
Doug Richard
4
3
3
Le Beanock
54000
Rachel Elnaugh
5
4
5
IV Cam
50000
Peter Jones
6
5
6
Mycorrhizal Systems
75000
Simon Woodroffe
7
6
8
Elizabeth Galton Ltd
110000
Duncan Bannatyne

Questions and formulas:
Question: How many entrepreneurs are there?
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: Count the number of entrepreneurs.
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: List the companies of entrepreneurs in descending order of money requested.
Formula: SORTBY(C1,D1,-1)
Formula2: SORTBY(C2:C7,D2:D7,-1)
Level: easy
Question: What are the companies of entrepreneurs, ordered descending by amount of money requested?
Formula: SORTBY(C1,D1,-1)
Formula2: SORTBY(C2:C7,D2:D7,-1)
Level: easy
Question: List the companies and the investors of entrepreneurs.
Formula: CHOOSE({1,2},C1,E1)
Formula2: CHOOSE({1,2},C2:C7,E2:E7)
Level: easy
Question: What are the companies and investors that correspond to each entrepreneur?
Formula: CHOOSE({1,2},C1,E1)
Formula2: CHOOSE({1,2},C2:C7,E2:E7)
Level: easy
Question: What is the average money requested by all entrepreneurs?
Formula: AVERAGE(D1)
Formula2: AVERAGE(D2:D7)
Level: easy
Question: Return the average money requested across all entrepreneurs.
Formula: AVERAGE(D1)
Formula2: AVERAGE(D2:D7)
Level: easy
Question: What are the investors of entrepreneurs and the corresponding number of entrepreneurs invested by each investor?
Formula: SUMMARIZE(E1,SUMX(A1))
Formula2: SUMMARIZE(E2:E7,SUMX(A2:A7))
Level: easy
Question: How many entrepreneurs correspond to each investor?
Formula: SUMMARIZE(E1,SUMX(A1))
Formula2: SUMMARIZE(E2:E7,SUMX(A2:A7))
Level: easy
Question: What is the investor that has invested in the most number of entrepreneurs?
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: Return the investor who have invested in the greatest number of entrepreneurs.
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: What are the investors that have invested in at least two entrepreneurs?
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Formula2: LET(query1,SUMMARIZE(E2:E7,SUMX(A2:A7)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Level: hard
Question: Return the investors who have invested in two or more entrepreneurs.
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Formula2: LET(query1,SUMMARIZE(E2:E7,SUMX(A2:A7)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Level: hard
Question: How many distinct companies are there?
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy
Question: Count the number of different companies.
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy
Question: The number of entrepreneurs.
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: How many entries for entrepreneurs are there? 
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: What are the companies and investors of entrepreneurs?
Formula: UNIQUE(HSTACK(C1,E1,A1))
Formula2: UNIQUE(HSTACK(C2:C7,E2:E7,A2:A7))
Level: easy
Question: Each entrepreneurs' corresponding companies and investors 
Formula: UNIQUE(HSTACK(C1,E1,A1))
Formula2: UNIQUE(HSTACK(C2:C7,E2:E7,A2:A7))
Level: easy
Question: The average amount of money requested by entrepreneurs.
Formula: SUMMARIZE(A1,AVERAGEX(D1))
Formula2: SUMMARIZE(A2:A7,AVERAGEX(D2:D7))
Level: easy
Question: How many entrepreneurs correspond to each investor?
Formula: SUMMARIZE(E1,SUMX(A1))
Formula2: SUMMARIZE(E2:E7,SUMX(A2:A7))
Level: easy
Question: The number of entrepreneurs corresponding to each investor.
Formula: SUMMARIZE(E1,SUMX(A1))
Formula2: SUMMARIZE(E2:E7,SUMX(A2:A7))
Level: easy
Question: Which investor has invested in the most entrepreneurs?
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: Who has invested in the most entrepreneurs?
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: All investors that have invested in at least two entrepreneurs.
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Formula2: LET(query1,SUMMARIZE(E2:E7,SUMX(A2:A7)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Level: hard
Question: Who have invested in at least two entrepreneurs?
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Formula2: LET(query1,SUMMARIZE(E2:E7,SUMX(A2:A7)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Level: hard
Question: The number of companies.
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy
Question: How many companies?
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy
Question: How many entrepreneurs?
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: The corresponding companies and investors to entrepreneurs
Formula: UNIQUE(HSTACK(C1,E1,A1))
Formula2: UNIQUE(HSTACK(C2:C7,E2:E7,A2:A7))
Level: easy
Question: The investor who has invested in the most entrepreneurs.
Formula: TAKE(SORT(SUMMARIZE(E1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(E2:E7,SUMX(A2:A7)), 2, -1), 1)
Level: hard
Question: The investors who have invested in at least two entrepreneurs.
Formula: LET(query1,SUMMARIZE(E1,SUMX(A1)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Formula2: LET(query1,SUMMARIZE(E2:E7,SUMX(A2:A7)),FILTER(query1,CHOOSECOLS(query1,3)>=2))
Level: hard
Question: The number of companies.
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy
Question: How many companies?
Formula: ROWS(UNIQUE(C1))
Formula2: ROWS(UNIQUE(C2:C7))
Level: easy