Table:
0
A
B
C
D
E
1
Date
Ships sunk (Pola)
Tonnage
U-boats destroyed (KuK)
U-boats destroyed (Pola)
2
1914
n/a
n/a
none
n/a
3
1915
102
350,853
2
none
4
1916
415
1,045,058
2
1
5
1917
(not recorded)
1,514,050
2
2
6
1918
325
761,060
3
10

Questions and formulas:
Question: What's the highest Date listed that has U-boats destroyed (Pola) of 1?
Formula: MAX(FILTER(A1, E1=1))
Formula2: MAX(FILTER(A2:A6, E2:E6=1))
Level: easy
Question: What is the listed Tonnage that has U-boats destroyed (KuK) of 2 and Ships sunk (Pola) of (not recorded)?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1=2)*(B1="(not recorded)")),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,(D2:D6=2)*(B2:B6="(not recorded)")),3))
Level: medium
Question: What is the listed Tonnage for the Date of 1914?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1=1914),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E6,A2:A6=1914),3))
Level: medium
Question: What is listed as the average Date that has U-boats destroyed (KuK) of 2 with Tonnage of 1,514,050?
Formula: AVERAGE(FILTER(A1, (D1=2)*(C1=1514050)))
Formula2: AVERAGE(FILTER(A2:A6, (D2:D6=2)*(C2:C6=1514050)))
Level: easy