Table:
0
A
B
C
D
E
F
G
H
I
J
1
Region
Start datum
Target datum
c_x ( Metre )
c_y (Metre)
c_z (Metre)
s ( ppm )
r x ( Arcsecond )
r y ( Arcsecond )
r z ( Arcsecond )
2
Slovenia ETRS89
D48
D96
409.545
72.164
486.872
17.919665
−3.085957
−5.469110
11.020289
3
England , Scotland , Wales
WGS84
OSGB36
−446.448
125.157
−542.06
20.4894
−0.1502
−0.247
−0.8421
4
Ireland
WGS84
Ireland 1965
−482.53
130.596
−564.557
−8.15
1.042
0.214
0.631
5
Germany
WGS84
DHDN
−591.28
−81.35
−396.39
−9.82
1.4770
−0.0736
−1.4580
6
Germany
WGS84
Bessel 1841
−582
−105
−414
−8.3
−1.04
−0.35
3.08
7
Germany
WGS84
Krassovski 1940
−24
123
94
−1.1
−0.02
0.26
0.13
8
Austria (BEV)
WGS84
MGI
−577.326
−90.129
−463.920
−2.423
5.137
1.474
5.297

Questions and formulas:
Question: How many values of r z (arcsecond) correspond with a r y (arcsecond) value of −0.247?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,I1="−0.247"),10))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J8,I2:I8="−0.247"),10))
Level: medium
Question: How many values of r z(arcsecond) are associated with a target datum of Ireland 1965?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:J1,C1="Ireland 1965"),10))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:J8,C2:C8="Ireland 1965"),10))
Level: medium