Table:
0
A
B
C
D
E
1
Date
Name
Flag
Tonnage (GRT)
Sunk by
2
16/17 March 1943
Kingsbury
United Kingdom
4,898
U-338
3
16/17 March 1943
King Gruffydd
United Kingdom
5,072
U-338
4
16/17 March 1943
Alderamin
Netherlands
7,886
U-338
5
17 March 1943
Fort Cedar Lake
United Kingdom
7,134
U-338 , U-665
6
17 March 1943
Port Auckland
United Kingdom
8,789
U-305
7
18 March 1943
Zouave
United Kingdom
4,256
U-305
8
18 March 1943
Granville
Panama
4,071
U-338
9
18/19 March 1943
Carras
Greece
5,234
U-333 , U-666
10
19 March 1943
Clarissa Radcliffe
United Kingdom
5,754
U-663

Questions and formulas:
Question: What is the date for Zouave?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="zouave"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,B2:B10="zouave"),1))
Level: medium
Question: What is the date where the tonnage is larger than 5,754 and the ship was sunk by U-305?
Formula: LET(query1,LET(query1,FILTER(A1:E1,E1="u-305"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>5754))
Formula2: LET(query1,LET(query1,FILTER(A2:E10,E2:E10="u-305"),SUMMARIZE(CHOOSECOLS(query1,1),SUMX(CHOOSECOLS(query1,4)))),FILTER(query1,CHOOSECOLS(query1,2)>5754))
Level: hard
Question: What is the date for the name of Granville?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="granville"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,B2:B10="granville"),1))
Level: medium
Question: What is the name of the ship sunk by U-305 on 17 March 1943?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(A1="17 march 1943")*(E1="u-305")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E10,(A2:A10="17 march 1943")*(E2:E10="u-305")),2))
Level: medium