Table:
0
A
B
C
D
E
F
G
1
#
Player
Age
Australian Open
French Open
Wimbledon
US Open
2
1
Maureen Connolly Brinker
18 years 254 days
1953
1953
1952
1951
3
2
Doris Hart
28 years 359 days
1949
1950
1951
1954
4
3
Shirley Fry Irvin
29 years 211 days
1957
1951
1956
1956
5
4
Margaret Court
20 years 353 days
1960
1962
1963
1962
6
5
Billie Jean King
28 years 241 days
1968
1972
1966
1967
7
6
Chris Evert
28 years 357 days
1982
1974
1974
1975
8
7
Martina Navratilova
26 years 328 days
1981
1982
1978
1983
9
8
Steffi Graf
19 years 89 days
1988
1987
1988
1988
10
9
Serena Williams
21 years 121 days
2003
2002
2002
1999

Questions and formulas:
Question: What is the number for the french open 1974?
Formula: SUM(FILTER(A1, E1=1974))
Formula2: SUM(FILTER(A2:A10, E2:E10=1974))
Level: easy
Question: When was the Australian open?
Formula: UNIQUE(D1)
Formula2: UNIQUE(D2:D10)
Level: easy
Question: How many ages have Maureen Connolly Brinker as the player?
Formula: ROWS(UNIQUE(FILTER(C1, B1="Maureen Connolly Brinker")))
Formula2: ROWS(UNIQUE(FILTER(C2:C10, B2:B10="Maureen Connolly Brinker")))
Level: medium
Question: When is the French Open when serena williams is the player?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:G1,B1="Serena Williams"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:G10,B2:B10="Serena Williams"),5))
Level: medium