The U.S. Quarter has a copper core surrounded by a 75% copper/ 25% nickel face.
The Australian five-cent coin is composed of 75% copper and 25% nickel. Both of these metals are comparitively good electrical conductors. Copper, in particular, is the second best, after silver.
The East Caribbean States 25 cent coin is made from a copper-nickel alloy. No British Caribbean Territories, East Caribbean Territories or East Caribbean States general circulation coin contains any precious metals.
The answer depends on what part of the world the question is about. The Eurozone has a 20 cent coin but not a 25 cent coin. The US, which is smaller, has a 25 cent coin but not a 20.
A US 5-cent coin is 75% copper and 25% nickel.
25 CENT
25 cents
25 cents
The answer depends on which country's (or countries') currency. That determines the coinage available. In the Eurozone, for example, there is a 20 cent coin but not a 25. In the US there is a 25 cent coin but not a 20 cent coin.
George Washington is on the 25-cent coin, not the 1-cent coin.
A quarter
In the United States, the 25 cent coin is better known as the quarter. The face of President George Washington is on the front of the quarter.
91.67% Cu 8.33% Ni