two quarters and five pennies
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The puzzle is actually stated "How can you make 55 cents with two coins if one isn't a nickel?", which rules out the use of quarters and pennies.
The answer is a half dollar and a nickel. The trick is that the question says only one can't be a nickel, it doesn't say they both can't be nickels.
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That's a trick question that usually goes, "one of them isn't a nickel." The answer is a half dollar and a nickel. One of them isn't a nickel, the other one is.
55 nickels is equal to $2.75. This can be calculated by multiplying the number of nickels (55) by the value of a nickel (5 cents). Therefore, 55 nickels x $0.05 = $2.75.
To make 55 cents using 12 coins, you could use 3 quarters (25 cents each), 1 nickel (5 cents), and 8 pennies (1 cent each). This combination adds up to 75 cents from the quarters, 5 cents from the nickel, and 8 cents from the pennies, totaling 55 cents.
.55 cents
A 50 cent piece and a nickel.