Table:
0
A
B
C
D
E
1
Year
Entrant
Chassis
Engine
Points
2
1951
Scuderia Milano
Maserati 4CLT/48
Maserati Straight-4
0
3
1954
Officine Alfieri Maserati
Maserati 250F
Maserati Straight-6
0
4
1956
Officine Alfieri Maserati
Maserati 250F
Maserati Straight-6
6
5
1957
Francesco Godia Sales
Maserati 250F
Maserati Straight-6
0
6
1958
Francesco Godia Sales
Maserati 250F
Maserati Straight-6
0

Questions and formulas:
Question: What is the average year of an entrant that had fewer than 6 points and a Maserati Straight-6 engine?
Formula: AVERAGE(FILTER(A1, (E1<6)*(D1="maserati straight-6")))
Formula2: AVERAGE(FILTER(A2:A6, (E2:E6<6)*(D2:D6="maserati straight-6")))
Level: easy
Question: What entrant had a Maserati 250F chassis and fewer than 6 points before 1957?
Formula: LET(query1,LET(query1,FILTER(A1:E1,(C1="maserati 250f")*(A1<1957)),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<6))
Formula2: LET(query1,LET(query1,FILTER(A2:E6,(C2:C6="maserati 250f")*(A2:A6<1957)),SUMMARIZE(CHOOSECOLS(query1,2),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<6))
Level: hard
Question: What chassis has a year of 1951?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1=1951),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6=1951),3))
Level: medium
Question: What is the chassis of Officine Alfieri Maserati with a Maserati Straight-6 engine and fewer than 6 points?
Formula: LET(query1,LET(query1,FILTER(A1:E1,(D1="maserati straight-6")*(B1="officine alfieri maserati")),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<6))
Formula2: LET(query1,LET(query1,FILTER(A2:E6,(D2:D6="maserati straight-6")*(B2:B6="officine alfieri maserati")),SUMMARIZE(CHOOSECOLS(query1,3),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<6))
Level: hard