Table:
0
A
B
C
D
E
F
1
Country
Currency name
Month with highest inflation rate
Highest monthly inflation rate
Equivalent daily inflation rate
Time required for prices to double
2
Hungary
Hungarian pengő
July 1946
4.19 × 10 16 %
207.19%
15 hours
3
Zimbabwe
Zimbabwe dollar
November 2008
7.96 × 10 10 %
98.01%
24.7 hours
4
Yugoslavia
Yugoslav dinar
January 1994
3.13 × 10 8 %
64.63%
1.4 days
5
Republika Srpska
Republika Srpska dinar
January 1994
2.97 × 10 8 %
64.3%
1.4 days
6
Germany
German Papiermark
October 1923
29,500%
20.87%
3.7 days

Questions and formulas:
Question: what's the time required for prices to double with highest monthly inflation rate being 29,500%
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="29,500%"),6))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="29,500%"),6))
Level: medium
Question: what's the currency name with highest monthly inflation rate being 29,500%
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="29,500%"),2))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="29,500%"),2))
Level: medium
Question:  how many equivalent daily inflation rate with time required for prices to double being 3.7 days
Formula: ROWS(UNIQUE(FILTER(E1, F1="3.7 days")))
Formula2: ROWS(UNIQUE(FILTER(E2:E6, F2:F6="3.7 days")))
Level: medium
Question:  how many country with currency name being republika srpska dinar
Formula: ROWS(UNIQUE(FILTER(A1, B1="Republika Srpska dinar")))
Formula2: ROWS(UNIQUE(FILTER(A2:A6, B2:B6="Republika Srpska dinar")))
Level: medium
Question:  how many equivalent daily inflation rate with currency name being republika srpska dinar
Formula: ROWS(UNIQUE(FILTER(E1, B1="Republika Srpska dinar")))
Formula2: ROWS(UNIQUE(FILTER(E2:E6, B2:B6="Republika Srpska dinar")))
Level: medium
Question: what's the country with highest monthly inflation rate being 3.13 × 10 8 %
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:F1,D1="3.13 × 10 8 %"),1))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:F6,D2:D6="3.13 × 10 8 %"),1))
Level: medium