Table:
0
A
B
C
D
E
1
Train No.
Train Name
Destination
Category
Frequency
2
11013/11014
Kurla Express
Lokmanya Tilak (T) Mumbai
Express
Daily
3
12083/12084
Janshatabdi Express
Mayiladuthurai
Janshatabdi
Except Tuesday
4
12243/12244
Duronto Express
Chennai
Duronto
Except Tuesday
5
12647/12648
Kongu Express
Hazrat Nizamuddin (New Delhi)
SF Express
Weekly
6
12671/12672
Nilgiri Express (slip)
Chennai
SF Express
Daily
7
12673/12674
Cheran Express
Chennai
SF Express
Daily
8
12675/12676
Kovai Express
Chennai
SF Express
Daily
9
12679/12680
Intercity Express
Chennai
SF Express
Daily
10
12681/12682
Chennai Express
Chennai
SF Express
Weekly
11
12969/12970
Jaipur Express
Jaipur
SF Express
Weekly
12
16609/16610
Nagercoil Express
Nagercoil
Express
Daily
13
16611/16612
Tuticorin Express
Tuticorin
Express
Daily
14
16613/16614
Rajkot Express
Rajkot
Express
Weekly
15
16615/16616
Chemmozhi Express
Mannargudi
Express
Daily
16
16617/16618
Rameswaram Express
Rameswaram
Express
Weekly
17
22475/22476
AC Express
Bikaner
SF Express
Weekly
18
22609/22610
Intercity Express
Mangalore
SF Express
Daily

Questions and formulas:
Question: What is the category for trains numbered 16609/16610?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="16609/16610"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E18,A2:A18="16609/16610"),4))
Level: medium
Question: What trains have a category of express and a weekly frequency?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1="Express")*(E1="Weekly")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E18,(D2:D18="Express")*(E2:E18="Weekly")),2))
Level: medium
Question: What is the train name that has a destination of Tuticorin?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,C1="Tuticorin"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E18,C2:C18="Tuticorin"),2))
Level: medium
Question: What is the frequency of trains numbered 12671/12672?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="12671/12672"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E18,A2:A18="12671/12672"),5))
Level: medium
Question: How many destinations have a weekly frequency and are named AC Express?
Formula: ROWS(UNIQUE(FILTER(C1, (E1="Weekly")*(B1="AC Express"))))
Formula2: ROWS(UNIQUE(FILTER(C2:C18, (E2:E18="Weekly")*(B2:B18="AC Express"))))
Level: medium
Question: What is the number of frequencies that have a destination of Jaipur?
Formula: ROWS(UNIQUE(FILTER(E1, C1="Jaipur")))
Formula2: ROWS(UNIQUE(FILTER(E2:E18, C2:C18="Jaipur")))
Level: medium