Table:
0
A
B
C
D
E
F
1
FOURCC
DX 10 Name
Description
Alpha premultiplied?
Compression ratio
Texture Type
2
DXT1
BC1
1-bit Alpha / Opaque
N/A
6:1(for 24 bit source image)
Simple non-alpha
3
DXT2
(none)
Explicit alpha
Yes
4:1
Sharp alpha
4
DXT3
BC2
Explicit alpha
No
4:1
Sharp alpha
5
DXT4
(none)
Interpolated alpha
Yes
4:1
Gradient alpha
6
DXT5
BC3
Interpolated alpha
No
4:1
Gradient alpha

Questions and formulas:
Question: Which DX 10 Name that has a No Alpha premultiplied and a Description of explicit alpha?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(D1="no")*(C1="explicit alpha")),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,(D2:D6="no")*(C2:C6="explicit alpha")),2))
Level: medium
Question: Which Compression ratio has a (none) DX 10 Name and a FOURCC of dxt4?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(B1="(none)")*(A1="dxt4")),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,(B2:B6="(none)")*(A2:A6="dxt4")),5))
Level: medium
Question: Which Alpha premultiplied has a 4:1 Compression ratio and a dxt3 FOURCC?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,(E1="4:1")*(A1="dxt3")),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,(E2:E6="4:1")*(A2:A6="dxt3")),4))
Level: medium