Table:
0
A
B
C
D
E
1
Species
Indole
Methyl Red
Voges-Proskauer
Citrate
2
Escherichia coli
Positive
Positive
Negative
Negative
3
Shigella spp.
Negative
Positive
Negative
Negative
4
Salmonella spp.
Negative
Positive
Negative
Positive
5
Klebsiella spp.
Negative
Negative
Positive
Positive
6
Proteus vulgaris
Positive
Positive
Negative
Negative
7
Proteus mirabilis
Negative
Positive
Negative
Positive
8
Enterobacter aerogenes
Negative
Negative
Positive
Positive

Questions and formulas:
Question: Which species has a Voges-Proskauer reading of negative and an indole reading of negative?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,(D1="negative")*(B1="negative")),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,(D2:D8="negative")*(B2:B8="negative")),1))
Level: medium
Question: What is the Voges-Proskauer reading for proteus mirabilis?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="proteus mirabilis"),4))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="proteus mirabilis"),4))
Level: medium
Question: What is the methyl red reading for the species that tests positive for indole?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="positive"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,B2:B8="positive"),3))
Level: medium
Question: What is the methyl red reading for proteus mirabilis?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,A1="proteus mirabilis"),3))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E8,A2:A8="proteus mirabilis"),3))
Level: medium