4 countries and those are in the U.K
There is no currency called the European pound. Several countries in Europe use the Euro as their currency. To compare this with other currencies use the link below
Euro
In 1912, the currency used varied by country. For example, in the United States, the dollar was the official currency, while in the United Kingdom, the pound sterling was in use. Similarly, many European countries used their own national currencies, such as the German mark and the French franc. Additionally, some countries were still using gold and silver standards for currency valuation.
If I was going to be a stickler -and I am-, I would answer that it is the no-longer-used Scandinavian currency called "Daler", which is the currency that led to the name "Dollar". However, Europe still has many different currencies, but I presume the answer you are looking for is the currency called "Euro".
There are many countries which use cents as a currency unit. There are also many countries which use pesos as a currency unit. Since you have not specified the two countries concerned, it is impossible to answer the question.
Many countries use dollar as their currency unit and they are not of the same value. Also, many countries use dinar as their currency unit and they are not of the same value. The question needs to be more specific.
Many (but not all) use the "Euro".
Many countries use "dollars" as their currency unit so it is not possible to give a sensible answer to this question.
There are many countries which use a Peso as their currency unit and also many countries which use a Dollar. You need to specify the two countries if you wish to get a sensible answer.
I do not know of a currency in use by 27 countries.
Many countries use a penny as a minor currency unit and it is likely that each one of these has a different density.
Several countries use the Dinar as a unit of currency, and more than one of those countries have issued a 25 Dinar note.
The question is too ambiguous. There are many countries that use pennies as a minor currency unit and you have nor specified which country, or all such countries.
Złoty
The local currency unit.
The Polish currency, it's the money they use.