Table:
0
A
B
C
D
1
MONTH
CALLS
SL
ACCURACY
2
DECEMBER
89
14
0.842696629
3
JANUARY
79
15
0.810126582
4
FEBRUARY
57
10
0.824561404
5
MARCH
67
6
0.910447761
6
APRIL
70
6
0.914285714
7
MAY
85
10
0.882352941
8
JUNE
88
10
0.886363636
9
JULY
91
12
0.868131868
10
AUGUST
51
10
0.803921569
11
SEPTEMBER
77
10
0.87012987
12
OCTOBER
57
8
0.859649123
13
NOVEMBER
31
6
0.806451613

Questions and formulas:
Question: Months when max accuracy is >= 0.806451613 and corresponding median accuracy
Formula: LET(query1,SUMMARIZE(A1,MAXX(D1),MEDIANX(D1)),FILTER(query1,CHOOSECOLS(query1,2)>=0.806451613))
Formula2: LET(query1,SUMMARIZE(A2:A13,MAXX(D2:D13),MEDIANX(D2:D13)),FILTER(query1,CHOOSECOLS(query1,2)>=0.806451613))
Level: hard
Question: Months when min SL is < 15 and >= 8.
Formula: LET(query1,SUMMARIZE(A1,MINX(C1)),FILTER(query1,(CHOOSECOLS(query1,2)<15)*(CHOOSECOLS(query1,2)>=8)))
Formula2: LET(query1,SUMMARIZE(A2:A13,MINX(C2:C13)),FILTER(query1,(CHOOSECOLS(query1,2)<15)*(CHOOSECOLS(query1,2)>=8)))
Level: hard
Question: Months when min calls > 57 and median SL > 8.
Formula: LET(query1,SUMMARIZE(A1,MINX(B1),MEDIANX(C1)),FILTER(query1,(CHOOSECOLS(query1,2)>57)*(CHOOSECOLS(query1,3)>8)))
Formula2: LET(query1,SUMMARIZE(A2:A13,MINX(B2:B13),MEDIANX(C2:C13)),FILTER(query1,(CHOOSECOLS(query1,2)>57)*(CHOOSECOLS(query1,3)>8)))
Level: hard
Question: Show table of calls  <= 85 when accuracy is < 0.882352941.
Formula: FILTER(A1:D1, (D1<0.882352941)*(B1<=85))
Formula2: FILTER(A2:D13, (D2:D13<0.882352941)*(B2:B13<=85))
Level: easy
Question: Table where SL is >= 12 or < 6.
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:D1,(C1>=12)+(C1<6)),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:D13,(C2:C13>=12)+(C2:C13<6)),3))
Level: medium
Question: Show table about calls <= 85 when accuracy is < 0.882352941.
Formula: FILTER(A1:D1, (D1<0.882352941)*(B1<=85))
Formula2: FILTER(A2:D13, (D2:D13<0.882352941)*(B2:B13<=85))
Level: easy
Question: Numbers of calls in different months from smallest to largest 
Formula: SORT(SUMMARIZE(A1,SUMX(B1)), 2, 1)
Formula2: SORT(SUMMARIZE(A2:A13,SUMX(B2:B13)), 2, 1)
Level: medium
Question: Numbers of calls from the smallest to the largest in different months.
Formula: SORT(SUMMARIZE(A1,SUMX(B1)), 2, 1)
Formula2: SORT(SUMMARIZE(A2:A13,SUMX(B2:B13)), 2, 1)
Level: medium
Question: Three lowest accuracy months
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, 1), 3)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, 1), 3)
Level: hard
Question: Three months with the lowest accuracy.
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, 1), 3)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, 1), 3)
Level: hard
Question: no.1 accuracy month
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, -1), 1)
Level: hard
Question: month with no.1 accuracy
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, -1), 1)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, -1), 1)
Level: hard
Question: Two least calls receiving months
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(B1)), 2, 1), 2)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(B2:B13)), 2, 1), 2)
Level: hard
Question: Which 2 months received least calls?
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(B1)), 2, 1), 2)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(B2:B13)), 2, 1), 2)
Level: hard
Question: 3 highest accuracy months
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, -1), 3)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, -1), 3)
Level: hard
Question: which months have the 3 highest accuracy?
Formula: TAKE(SORT(SUMMARIZE(A1,SUMX(D1)), 2, -1), 3)
Formula2: TAKE(SORT(SUMMARIZE(A2:A13,SUMX(D2:D13)), 2, -1), 3)
Level: hard
Question: Middle number of accuracy
Formula: MEDIAN(D1)
Formula2: MEDIAN(D2:D13)
Level: easy
Question: What is the median number of accuracy?
Formula: MEDIAN(D1)
Formula2: MEDIAN(D2:D13)
Level: easy
Question: Monthly median service level and median accuracy rate.
Formula: SUMMARIZE(A1,MEDIANX(C1),MEDIANX(D1))
Formula2: SUMMARIZE(A2:A13,MEDIANX(C2:C13),MEDIANX(D2:D13))
Level: medium
Question: How many months have minimum calls >= 31?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MINX(B1)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MINX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: How many months have minimum calls no less than 31?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MINX(B1)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MINX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: How many months have total SL > 6?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,SUMX(C1)),FILTER(query1,CHOOSECOLS(query1,2)>6)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,SUMX(C2:C13)),FILTER(query1,CHOOSECOLS(query1,2)>6)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: How many months have total SL more than 6?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,SUMX(C1)),FILTER(query1,CHOOSECOLS(query1,2)>6)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,SUMX(C2:C13)),FILTER(query1,CHOOSECOLS(query1,2)>6)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: how many months have median accuracies >= 0.810126582?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MEDIANX(D1)),FILTER(query1,CHOOSECOLS(query1,2)>=0.810126582)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MEDIANX(D2:D13)),FILTER(query1,CHOOSECOLS(query1,2)>=0.810126582)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: how many months have median accuracies that no less than 0.810126582?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MEDIANX(D1)),FILTER(query1,CHOOSECOLS(query1,2)>=0.810126582)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MEDIANX(D2:D13)),FILTER(query1,CHOOSECOLS(query1,2)>=0.810126582)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: The number of months having least calls < 88.
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MINX(B1)),FILTER(query1,CHOOSECOLS(query1,2)<88)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MINX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)<88)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: The number of months having least calls less than 88.
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,MINX(B1)),FILTER(query1,CHOOSECOLS(query1,2)<88)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,MINX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)<88)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: numbers of month with average calls > 67 but <= 91.
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,AVERAGEX(B1)),FILTER(query1,(CHOOSECOLS(query1,2)>67)*(CHOOSECOLS(query1,2)<=91))),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,AVERAGEX(B2:B13)),FILTER(query1,(CHOOSECOLS(query1,2)>67)*(CHOOSECOLS(query1,2)<=91))),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: numbers of month with average calls that more than 67 but no more than 91.
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,AVERAGEX(B1)),FILTER(query1,(CHOOSECOLS(query1,2)>67)*(CHOOSECOLS(query1,2)<=91))),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,AVERAGEX(B2:B13)),FILTER(query1,(CHOOSECOLS(query1,2)>67)*(CHOOSECOLS(query1,2)<=91))),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: How many months have average calls >= 31?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,AVERAGEX(B1)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,AVERAGEX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: How many months have average calls no lower than 31?
Formula: ROWS(UNIQUE(LET(a,A1,b,A1,c,INDEX(LET(query1,SUMMARIZE(A1,AVERAGEX(B1)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Formula2: ROWS(UNIQUE(LET(a,A2:A13,b,A2:A13,c,INDEX(LET(query1,SUMMARIZE(A2:A13,AVERAGEX(B2:B13)),FILTER(query1,CHOOSECOLS(query1,2)>=31)),,1),FILTER(a,NOT(ISNA(XLOOKUP(b,c,c)))))))
Level: hard
Question: Average calls for the month starts with 'AUG'.
Formula: LET(query1,FILTER(A1:D1,LEFT(A1,LEN("AUG"))="AUG"),SUMMARIZE(CHOOSECOLS(query1,1),AVERAGEX(CHOOSECOLS(query1,2))))
Formula2: LET(query1,FILTER(A2:D13,LEFT(A2:A13,LEN("AUG"))="AUG"),SUMMARIZE(CHOOSECOLS(query1,1),AVERAGEX(CHOOSECOLS(query1,2))))
Level: hard
Question: Average calls of each month starting with 'AUG'.
Formula: LET(query1,FILTER(A1:D1,LEFT(A1,LEN("AUG"))="AUG"),SUMMARIZE(CHOOSECOLS(query1,1),AVERAGEX(CHOOSECOLS(query1,2))))
Formula2: LET(query1,FILTER(A2:D13,LEFT(A2:A13,LEN("AUG"))="AUG"),SUMMARIZE(CHOOSECOLS(query1,1),AVERAGEX(CHOOSECOLS(query1,2))))
Level: hard