Table:
0
A
B
C
D
E
1
landsvæði
(English)
Population 2011-01-01
Area (km²)
Pop./ km²
2
Höfuðborgarsvæði
Capital Region
202 131
1 062
190.33
3
Suðurnes (formerly Reykjanes )
Southern Peninsula
21 088
829
25.44
4
Vesturland
West
15 589
9 554
1.63
5
Vestfirðir
Westfjords
7 137
9 409
0.76
6
Norðurland vestra
Northwest
7 393
12 737
0.58
7
Norðurland eystra
Northeast
29 006
21 968
1.32
8
Austurland
East
12 306
22 721
0.54
9
Suðurland
South
23 802
24 526
0.97
10
Ísland
Iceland
318 452
102 928
3.1

Questions and formulas:
Question: What area has less than 0.97 mil in population and is on the east?
Formula: LET(query1,LET(query1,FILTER(A1:E1,B1="east"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<0.97))
Formula2: LET(query1,LET(query1,FILTER(A2:E10,B2:B10="east"),SUMMARIZE(CHOOSECOLS(query1,4),SUMX(CHOOSECOLS(query1,5)))),FILTER(query1,CHOOSECOLS(query1,2)<0.97))
Level: hard
Question: What is the area for a population of 0.58 km?
Formula: LET(query1,SUMMARIZE(D1,SUMX(E1)),FILTER(query1,CHOOSECOLS(query1,2)=0.58))
Formula2: LET(query1,SUMMARIZE(D2:D10,SUMX(E2:E10)),FILTER(query1,CHOOSECOLS(query1,2)=0.58))
Level: hard