Table:
0
A
B
C
D
E
1
Country
Currency
1 Euro =
1 USD =
Central bank
2
Argentina
Argentine peso (ARS)
5.72079
4.34950
Central Bank of Argentina
3
Bolivia
Bolivian boliviano (BOB)
9.02081
6.86000
Central Bank of Bolivia
4
Brazil
Brazilian real (BRL)
2.25592
1.71577
Central Bank of Brazil
5
Chile
Chilean peso (CLP)
635.134
483.050
Central Bank of Chile
6
Colombia
Colombian peso (COP)
2,353.40
1,790.00
Bank of the Republic
7
Ecuador
U.S. dollar (USD)
1.46611
1
Federal Reserve
8
Guyana
Guyanese dollar (GYD)
264.192
200.950
Bank of Guyana
9
Paraguay
Paraguayan guaraní (PYG)
4,500.00
5,916.27
Central Bank of Paraguay
10
Peru
Peruvian nuevo sol (PEN)
3.53004
2.68500
Central Reserve Bank of Peru
11
Suriname
Surinamese dollar (SRD)
4.27296
3.25000
Central Bank of Suriname
12
Uruguay
Uruguayan peso (UYU)
25.3797
19.3000
Central Bank of Uruguay

Questions and formulas:
Question: What's the value of 1 USD in Paraguay?
Formula: SUMIFS(D1,A1,"Paraguay")
Formula2: SUMIFS(D2:D12,A2:A12,"Paraguay")
Level: easy
Question: What's the value of 1 Euro in the country where the value of 1 USD is 483.050 of the local currency?
Formula: SUM(FILTER(C1, D1=483.05))
Formula2: SUM(FILTER(C2:C12, D2:D12=483.05))
Level: easy
Question: What's the name of the central bank in the country where Colombian Peso (cop) is the local currency?
Formula: UNIQUE(CHOOSECOLS(FILTER(A1:E1,B1="Colombian peso (COP)"),5))
Formula2: UNIQUE(CHOOSECOLS(FILTER(A2:E12,B2:B12="Colombian peso (COP)"),5))
Level: medium
Question: What's the name of the country where 1 USD equals 1.71577 of the local currency.
Formula: LET(query1,SUMMARIZE(A1,SUMX(D1)),FILTER(query1,CHOOSECOLS(query1,2)=1.71577))
Formula2: LET(query1,SUMMARIZE(A2:A12,SUMX(D2:D12)),FILTER(query1,CHOOSECOLS(query1,2)=1.71577))
Level: hard