Table:
0
A
B
C
D
E
F
G
H
I
J
1
id
series name
country
language
content
pixel aspect ratio par
hight definition tv
pay per view ppv
package option
tv channel
2
700
Sky Radio
Italy
Italian
music
4:3
no
no
Sky Famiglia
3
701
Sky Music
Italy
Italian
music
4:3
no
no
Sky Famiglia
4
703
Music Box Italia
Italy
Italian
music
4:3 / 16:9
no
no
Sky Famiglia
5
704
MTV Hits
Italy
Italian
music
16:9
no
no
Sky Famiglia
6
705
MTV Classic
Italy
Italian
music
4:3
no
no
Sky Famiglia
7
706
MTV Rocks
United Kingdom
English
music
16:9
no
no
Sky Famiglia
8
707
MTV Dance
United Kingdom
English
music
16:9
no
no
Sky Famiglia
9
708
MTV Music
Italy
Italian
music
16:9
no
no
no ( FTV )
10
709
MTV Live HD
Poland
English
music
16:9
yes
no
Sky Famiglia + Sky HD
11
713
Radio Capital TiVù
Italy
Italian
music
4:3
no
no
no ( FTV )
12
714
myDeejay
Italy
Italian
music
16:9
no
no
Sky Famiglia
13
715
Match Music
Italy
Italian
music
4:3 / 16:9
no
no
Sky Famiglia
14
717
Rock TV
Italy
Italian
music
4:3 / 16:9
no
no
Sky Famiglia
15
719
Hip Hop TV
Italy
Italian
music
4:3
no
no
Sky Famiglia
16
728
Classica
Italy
Italian
music
4:3
no
no
Option

Questions and formulas:
Question: Which country has the most of TV Channels? 
Formula: TAKE(SORT(SUMMARIZE(C1,DCOUNTX(J1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C16,DCOUNTX(J2:J16)), 2, -1), 1)
Level: hard
Question: What is the country with the most number of TV Channels?
Formula: TAKE(SORT(SUMMARIZE(C1,DCOUNTX(J1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C16,DCOUNTX(J2:J16)), 2, -1), 1)
Level: hard
Question: List the number of different series names and contents in the TV Channel table.
Formula: CHOOSE({1,2},ROWS(UNIQUE(B1)),ROWS(UNIQUE(E1)))
Formula2: CHOOSE({1,2},ROWS(UNIQUE(B2:B16)),ROWS(UNIQUE(E2:E16)))
Level: hard
Question: How many different series and contents are listed in the TV Channel table?
Formula: CHOOSE({1,2},ROWS(UNIQUE(B1)),ROWS(UNIQUE(E1)))
Formula2: CHOOSE({1,2},ROWS(UNIQUE(B2:B16)),ROWS(UNIQUE(E2:E16)))
Level: hard
Question: What is the content of TV Channel with serial name "Sky Radio"?
Formula: FILTER(E1,B1="Sky Radio")
Formula2: FILTER(E2:E16,B2:B16="Sky Radio")
Level: easy
Question: What is the content of the series Sky Radio?
Formula: FILTER(E1,B1="Sky Radio")
Formula2: FILTER(E2:E16,B2:B16="Sky Radio")
Level: easy
Question: What is the Package Option of TV Channel with serial name "Sky Radio"?
Formula: FILTER(I1,B1="Sky Radio")
Formula2: FILTER(I2:I16,B2:B16="Sky Radio")
Level: easy
Question: What are the Package Options of the TV Channels whose series names are Sky Radio?
Formula: FILTER(I1,B1="Sky Radio")
Formula2: FILTER(I2:I16,B2:B16="Sky Radio")
Level: easy
Question: How many TV Channel using language English?
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: How many TV Channels use the English language?
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: List the language used least number of TV Channel.
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(J1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,DCOUNTX(J2:J16)), 2, 1), 1)
Level: hard
Question: What are the languages used by the least number of TV Channels and how many channels use it?
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(J1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,DCOUNTX(J2:J16)), 2, 1), 1)
Level: hard
Question: List each language and the number of TV Channels using it.
Formula: SUMMARIZE(D1,DCOUNTX(J1))
Formula2: SUMMARIZE(D2:D16,DCOUNTX(J2:J16))
Level: easy
Question: For each language, list the number of TV Channels that use it.
Formula: SUMMARIZE(D1,DCOUNTX(J1))
Formula2: SUMMARIZE(D2:D16,DCOUNTX(J2:J16))
Level: easy
Question: Find the package choice and series name of the TV channel that has high definition TV.
Formula: CHOOSE({1,2},FILTER(I1,G1="yes"),FILTER(B1,G1="yes"))
Formula2: CHOOSE({1,2},FILTER(I2:I16,G2:G16="yes"),FILTER(B2:B16,G2:G16="yes"))
Level: medium
Question: What are the package options and the name of the series for the TV Channel that supports high definition TV?
Formula: CHOOSE({1,2},FILTER(I1,G1="yes"),FILTER(B1,G1="yes"))
Formula2: CHOOSE({1,2},FILTER(I2:I16,G2:G16="yes"),FILTER(B2:B16,G2:G16="yes"))
Level: medium
Question: find the pixel aspect ratio and tv channels that do not use English.
Formula: LET(query1,FILTER(A1:J1,D1<>"english"),UNIQUE(CHOOSECOLS(query1,6,10)))
Formula2: LET(query1,FILTER(A2:J16,D2:D16<>"english"),UNIQUE(CHOOSECOLS(query1,6,10)))
Level: hard
Question: What is the pixel aspect ratio and country of origin for all TV channels that do not use English?
Formula: CHOOSE({1,2},FILTER(F1,D1<>"English"),FILTER(C1,D1<>"English"))
Formula2: CHOOSE({1,2},FILTER(F2:F16,D2:D16<>"English"),FILTER(C2:C16,D2:D16<>"English"))
Level: medium
Question: find id of the tv channels that from the countries where have more than two tv channels.
Formula: LET(a,HSTACK(A1,J1,C1),b,C1,c,CHOOSECOLS(LET(query1,SUMMARIZE(C1,DCOUNTX(J1)),FILTER(query1,CHOOSECOLS(query1,3)>2)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Formula2: LET(a,HSTACK(A2:A16,J2:J16,C2:C16),b,C2:C16,c,CHOOSECOLS(LET(query1,SUMMARIZE(C2:C16,DCOUNTX(J2:J16)),FILTER(query1,CHOOSECOLS(query1,3)>2)),1),UNIQUE(FILTER(a,NOT(ISNA(XLOOKUP(b,c,c))))))
Level: hard
Question: What are the ids that have more than 2 TV channels?
Formula: LET(query1,SUMMARIZE(A1,DCOUNTX(J1)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Formula2: LET(query1,SUMMARIZE(A2:A16,DCOUNTX(J2:J16)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Level: hard
Question: Country with the most TV channels
Formula: TAKE(SORT(SUMMARIZE(C1,DCOUNTX(J1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C16,DCOUNTX(J2:J16)), 2, -1), 1)
Level: hard
Question: Which country has the most tv channels?
Formula: TAKE(SORT(SUMMARIZE(C1,DCOUNTX(J1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C16,DCOUNTX(J2:J16)), 2, -1), 1)
Level: hard
Question: Sky radio's contents and tv channels 
Formula: LET(query1,FILTER(A1:J1,B1="sky radio"),UNIQUE(CHOOSECOLS(query1,5,10)))
Formula2: LET(query1,FILTER(A2:J16,B2:B16="sky radio"),UNIQUE(CHOOSECOLS(query1,5,10)))
Level: hard
Question: The contents of sky radio.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,B1="sky radio"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J16,B2:B16="sky radio"),5))
Level: medium
Question: The package options and tv channels for sky radio.
Formula: LET(query1,FILTER(A1:J1,B1="sky radio"),UNIQUE(CHOOSECOLS(query1,9,10)))
Formula2: LET(query1,FILTER(A2:J16,B2:B16="sky radio"),UNIQUE(CHOOSECOLS(query1,9,10)))
Level: hard
Question: Number of English TV channels
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: How many English tv channels?
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: Which language is least commonly used? 
Formula: TAKE(SORT(SUMMARIZE(D1,COUNTX(D1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,COUNTX(D2:D16)), 2, 1), 1)
Level: hard
Question: Number of TV channels for each language
Formula: SUMMARIZE(D1,DCOUNTX(J1))
Formula2: SUMMARIZE(D2:D16,DCOUNTX(J2:J16))
Level: easy
Question: The number of tv channels per language.
Formula: SUMMARIZE(D1,DCOUNTX(J1))
Formula2: SUMMARIZE(D2:D16,DCOUNTX(J2:J16))
Level: easy
Question: What are the package options and series names for HD TV channels?
Formula: UNIQUE(HSTACK(I1,B1,J1,G1))
Formula2: UNIQUE(HSTACK(I2:I16,B2:B16,J2:J16,G2:G16))
Level: easy
Question: Show all package options and series names for HD TV channels
Formula: UNIQUE(HSTACK(I1,B1,J1,G1))
Formula2: UNIQUE(HSTACK(I2:I16,B2:B16,J2:J16,G2:G16))
Level: easy
Question: What are the pixel aspect ratios for non-English channels?
Formula: LET(query1,FILTER(A1:J1,D1<>"english"),UNIQUE(CHOOSECOLS(query1,6,10)))
Formula2: LET(query1,FILTER(A2:J16,D2:D16<>"english"),UNIQUE(CHOOSECOLS(query1,6,10)))
Level: hard
Question: The pixel aspect ratios of non-English TV channels in each different country
Formula: LET(query1,FILTER(A1:J1,D1<>"english"),UNIQUE(CHOOSECOLS(query1,6,3,10)))
Formula2: LET(query1,FILTER(A2:J16,D2:D16<>"english"),UNIQUE(CHOOSECOLS(query1,6,3,10)))
Level: hard
Question: What are the ids for the countries with more than 2 tv channels?
Formula: LET(query1,SUMMARIZE(HSTACK(A1,C1),DCOUNTX(J1)),FILTER(query1,CHOOSECOLS(query1,4)>2))
Formula2: LET(query1,SUMMARIZE(HSTACK(A2:A16,C2:C16),DCOUNTX(J2:J16)),FILTER(query1,CHOOSECOLS(query1,4)>2))
Level: hard
Question: Which IDs have more than 2 tv channels?
Formula: LET(query1,SUMMARIZE(A1,DCOUNTX(J1)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Formula2: LET(query1,SUMMARIZE(A2:A16,DCOUNTX(J2:J16)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Level: hard
Question: The country having the most tv channels.
Formula: TAKE(SORT(SUMMARIZE(C1,DCOUNTX(J1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(C2:C16,DCOUNTX(J2:J16)), 2, -1), 1)
Level: hard
Question: The contents and tv channels for sky radio.
Formula: LET(query1,FILTER(A1:J1,B1="sky radio"),UNIQUE(CHOOSECOLS(query1,5,10)))
Formula2: LET(query1,FILTER(A2:J16,B2:B16="sky radio"),UNIQUE(CHOOSECOLS(query1,5,10)))
Level: hard
Question: The number of tv channels that use English.
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: What is the number of tv channels using English?
Formula: ROWS(UNIQUE(FILTER(J1, D1="english")))
Formula2: ROWS(UNIQUE(FILTER(J2:J16, D2:D16="english")))
Level: medium
Question: Which language is used by the least tv channels?
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(J1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,DCOUNTX(J2:J16)), 2, 1), 1)
Level: hard
Question: The language which least tv channel use.
Formula: TAKE(SORT(SUMMARIZE(D1,DCOUNTX(J1)), 2, 1), 1)
Formula2: TAKE(SORT(SUMMARIZE(D2:D16,DCOUNTX(J2:J16)), 2, 1), 1)
Level: hard
Question: What is the number of tv channels of each language?
Formula: SUMMARIZE(D1,DCOUNTX(J1))
Formula2: SUMMARIZE(D2:D16,DCOUNTX(J2:J16))
Level: easy
Question: The package options and series names for TV channels supporting high definition TV.
Formula: LET(query1,FILTER(A1:J1,G1="yes"),UNIQUE(CHOOSECOLS(query1,9,2,10)))
Formula2: LET(query1,FILTER(A2:J16,G2:G16="yes"),UNIQUE(CHOOSECOLS(query1,9,2,10)))
Level: hard
Question: The pixel aspect ratios of non-English TV channels across countries.
Formula: LET(query1,FILTER(A1:J1,D1<>"english"),UNIQUE(CHOOSECOLS(query1,6,3,10)))
Formula2: LET(query1,FILTER(A2:J16,D2:D16<>"english"),UNIQUE(CHOOSECOLS(query1,6,3,10)))
Level: hard
Question: The ids with more than 2 tv channels.
Formula: LET(query1,SUMMARIZE(A1,DCOUNTX(J1)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Formula2: LET(query1,SUMMARIZE(A2:A16,DCOUNTX(J2:J16)),FILTER(query1,CHOOSECOLS(query1,3)>2))
Level: hard
Question: The package options and tv channels for sky radio.
Formula: LET(query1,FILTER(A1:J1,B1="sky radio"),UNIQUE(CHOOSECOLS(query1,9,10)))
Formula2: LET(query1,FILTER(A2:J16,B2:B16="sky radio"),UNIQUE(CHOOSECOLS(query1,9,10)))
Level: hard