The answer depends on the country (or region) whose currency you are working with. For example, the US has a 25 cent coin but not a 20 cent coin. The Eurozone has a 20 cent but not a 25 cent. Some countries have no coins smaller than 10 minor units.
Since you have not specified which country/region you are interested in, it is not possible to provide a more useful answer.
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It is impossible to have 14 coins equal to 25 cents.
14 quartes, 14 dimes , 28 pennies
3 dollar coins, 4 dimes, 3 nickels, 4 pennies.
8 nickels and 6 dimes
A nickel is 5 cents, and $2 is 200 cents. Thus you need 200/5 = 40 coins.