If you have only 3 coins and 1 is a penny is it possible for you to have a Dollar?
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3At least a Dollar or exact one Dollar? What coins (values) are available? – HendryXT Aug 31 '15 at 14:23
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If it's a dollar or more, than Dominik has answered you. Yes there are dollar coins. However we can't have exactly $1$ dollar. If we had exactly $1$ dollar than that would require us to use coins lower than a dollar. Coins with values:
$.01$
$.05$
$.1$
$.25$
$.50$
Since you already specified that one of the $3$ coins is a penny the other two should add up to $.99$.
We can't use two half dollars for an obvious reason.
And the next two coins of largest value would be $.5+.25$
But that isn't even enough to get to $.99$
Ahmed S. Attaalla
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Yes it is. For example, you could have a penny, another penny and a dollar.
Note that the question asks whether it is possible to have a dollar; It doesn't ask whether it is possible for the sum of the values of your coins to be a a dollar.
Dominik
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Also: You could have three pennies, and also another ninety-seven pennies. – WillO Sep 01 '15 at 03:43