Table:
0
A
B
C
D
E
F
G
H
I
J
1
Year
Population
Serbs
Germans
Romanians
Hungarians
Croats
Roma
Slovaks
Rest
2
1910
34034
45.52%
19.30%
16.65%
15.64%
0.09%
1.28%
0.12%
1.70%
3
1931
35600
50.66%
20.68%
n/d
13.0%
n/d
n/d
n/d
15.64%
4
1961
39994
73.1%
n/d
17.6%
13.59%
n/d
0.04%
0.14%
5.27%
5
1991
38263
73.53%
0.20%
4.54%
10.28%
0.39%
2.47%
0.05%
8.54%
6
2002
36802
76.75%
0.13%
3.7%
9.26%
0.3%
3.1%
0.11%
7.44%

Questions and formulas:
Question: What is every value for Serbs if value for Hungarians is 9.26%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,F1="9.26%"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J6,F2:F6="9.26%"),3))
Level: medium
Question: What is the largest value of population?
Formula: MAX(B1)
Formula2: MAX(B2:B6)
Level: easy
Question: How many values for Germans occurs when value for Slovaks is 0.11%?
Formula: ROWS(UNIQUE(FILTER(D1, I1="0.11%")))
Formula2: ROWS(UNIQUE(FILTER(D2:D6, I2:I6="0.11%")))
Level: medium
Question: What is the smallest value of population if the value for Serbs is 73.53%?
Formula: MINIFS(B1,C1,"73.53%")
Formula2: MINIFS(B2:B6,C2:C6,"73.53%")
Level: easy
Question: What is every value for Croats if the value of Roma is 3.1%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,H1="3.1%"),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J6,H2:H6="3.1%"),7))
Level: medium
Question: What is every value for Croats when value for Romanians is 16.65%?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,E1="16.65%"),7))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J6,E2:E6="16.65%"),7))
Level: medium