Table:
0
A
B
C
D
E
1
Date
ID code of his Zero Fighter
Flight hours
Count
Sub-total
2
Apr.3 (Sat.)
T2-187
1:30
1
1:00
3
Apr.7 (Wed.)
T2-129
6:00
2 (Operation X)
7:30
4
Apr.7 (Wed.)
T2-129
1:00
3
8:30
5
Apr.8 (Thur.)
T2-117
1:00
4
9:30
6
Apr.9 (Fri.)
T2-169
2:00
5 & 6
11:30
7
Apr.11(Sun.)
T2-165
1:00
7
12:30
8
Apr.12(Mon.)
T2-169
6:00
8 (Operation Y)
18:30
9
Apr.14(Wed.)
T2-169
5:30
9 (Operation Y1)
24:00
10
Apr.18(Sun.)
T2-169
2:15
10
26:15
11
Apr.18(Sun.)
T2-169
1:45
11
28:00

Questions and formulas:
Question: Which Zero Fighter has a count of 10?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,D1=10),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,D2:D11=10),2))
Level: medium
Question: On which day were the subtotal hours 9:30?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,E1="9:30"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,E2:E11="9:30"),1))
Level: medium
Question: What is the count for the Zero Fighter with hours of 2:00?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="2:00"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E11,C2:C11="2:00"),4))
Level: medium