Table:
0
A
B
C
D
E
F
G
1
#
Player
Age
Australian Open
French Open
Wimbledon
US Open
2
1
Fred Perry
26
1934
1935
1934
1933
3
2
Don Budge
23
1938
1938
1937
1937
4
3
Rod Laver
24
1960
1962
1961
1962
5
4
Roy Emerson
27
1961
1963
1964
1961
6
5
Andre Agassi
29
1995
1999
1992
1994
7
6
Roger Federer
27
2004
2009
2003
2004

Questions and formulas:
Question: How many players are on this list?
Formula: SUM(A1)
Formula2: SUM(A2:A7)
Level: easy
Question: Who won the French Open in 1999?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,E1=1999),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,E2:E7=1999),2))
Level: medium
Question: Who won the US Open in 1937?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,G1=1937),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G7,G2:G7=1937),2))
Level: medium
Question: How many times did Roy Emerson win the Australian Open?
Formula: ROWS(UNIQUE(FILTER(D1, B1="Roy Emerson")))
Formula2: ROWS(UNIQUE(FILTER(D2:D7, B2:B7="Roy Emerson")))
Level: medium
Question: At what age did Roy Emerson complete the Grand Slam?
Formula: SUMIFS(C1,B1,"Roy Emerson")
Formula2: SUMIFS(C2:C7,B2:B7,"Roy Emerson")
Level: easy