Question 672875
There are <font color="red">7</font> ways to do this (where you use exactly 19 coins to get $1.00):


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18 nickels + 1 dime = $1.00


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5 pennies + 9 nickels + 5 dimes = $1.00


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5 pennies + 12 nickels + 1 dime + 1 quarter = $1.00


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10 pennies + 9 dimes = $1.00


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10 pennies + 3 nickels + 5 dimes + 1 quarter = $1.00


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10 pennies + 6 nickels + 1 dime + 2 quarters = $1.00


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15 pennies + 1 dime + 3 quarters = $1.00


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Again, there are <font color="red">7</font> ways to do this