Table:
0
A
B
C
D
E
F
1
race id
name
class
date
track id
2
1
Rolex 24 At Daytona
DP/GT
January 26 January 27
1
3
2
Gainsco Grand Prix of Miami
DP/GT
March 29
2
4
3
Mexico City 250
DP/GT
April 19
2
5
4
Bosch Engineering 250 at VIR
GT
April 27
4
6
5
RumBum.com 250
DP/GT
May 17
5
7
6
Lime Rock GT Classic 250
GT
May 26
6
8
7
Sahlen's Six Hours of the Glen
DP/GT
June 7
7

Questions and formulas:
Question: How many races are there?
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: Count the number of races.
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: What are the distinct classes that races can have?
Formula: UNIQUE(C1)
Formula2: UNIQUE(C2:C8)
Level: easy
Question: Return the different classes of races.
Formula: UNIQUE(C1)
Formula2: UNIQUE(C2:C8)
Level: easy
Question: Show name, class, and date for all races.
Formula: CHOOSE({1,2,3},B1,C1,D1)
Formula2: CHOOSE({1,2,3},B2:B8,C2:C8,D2:D8)
Level: easy
Question: What are the names, classes, and dates for all races?
Formula: CHOOSE({1,2,3},B1,C1,D1)
Formula2: CHOOSE({1,2,3},B2:B8,C2:C8,D2:D8)
Level: easy
Question: What are the different classes of races, and how many races correspond to each?
Formula: SUMMARIZE(C1,SUMX(A1))
Formula2: SUMMARIZE(C2:C8,SUMX(A2:A8))
Level: easy
Question: What is the class with most number of races.
Formula: TAKE(SORT(SUMMARIZE(C1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,SUMX(A2:A8)), 2, -1), 1)
Level: hard
Question: Give the class that is most common.
Formula: TAKE(SORT(SUMMARIZE(C1,COUNTX(C1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,COUNTX(C2:C8)), 2, -1), 1)
Level: hard
Question: How many races have taken place?
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: Total count of races
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: Classes and race IDs 
Formula: UNIQUE(HSTACK(C1,A1))
Formula2: UNIQUE(HSTACK(C2:C8,A2:A8))
Level: easy
Question: What's the class and race id?
Formula: UNIQUE(HSTACK(C1,A1))
Formula2: UNIQUE(HSTACK(C2:C8,A2:A8))
Level: easy
Question: the names, classes, dates and race ids.
Formula: UNIQUE(HSTACK(B1,C1,D1,A1))
Formula2: UNIQUE(HSTACK(B2:B8,C2:C8,D2:D8,A2:A8))
Level: easy
Question: The names, classes, and dates of races.
Formula: UNIQUE(HSTACK(B1,C1,D1,A1))
Formula2: UNIQUE(HSTACK(B2:B8,C2:C8,D2:D8,A2:A8))
Level: easy
Question: How many races are in each class?
Formula: SUMMARIZE(C1,SUMX(A1))
Formula2: SUMMARIZE(C2:C8,SUMX(A2:A8))
Level: easy
Question: which class has the most races?
Formula: TAKE(SORT(SUMMARIZE(C1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,SUMX(A2:A8)), 2, -1), 1)
Level: hard
Question: Most participating class
Formula: TAKE(SORT(SUMMARIZE(C1,COUNTX(C1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,COUNTX(C2:C8)), 2, -1), 1)
Level: hard
Question: How many races?
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: the count of races.
Formula: SUM(A1)
Formula2: SUM(A2:A8)
Level: easy
Question: the class and race id.
Formula: UNIQUE(HSTACK(C1,A1))
Formula2: UNIQUE(HSTACK(C2:C8,A2:A8))
Level: easy
Question: How many races for each class?
Formula: SUMMARIZE(C1,SUMX(A1))
Formula2: SUMMARIZE(C2:C8,SUMX(A2:A8))
Level: easy
Question: the class with the most races.
Formula: TAKE(SORT(SUMMARIZE(C1,SUMX(A1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,SUMX(A2:A8)), 2, -1), 1)
Level: hard
Question: Which class participated most? 
Formula: TAKE(SORT(SUMMARIZE(C1,COUNTX(C1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C8,COUNTX(C2:C8)), 2, -1), 1)
Level: hard