One dollar can be made by adding the values of the following 21 U.S. coins:
10 pennies (10 ¢)
7 nickels (35 ¢)
3 dimes (30 ¢)
1 quarter (25 ¢)
There are also many other possible configurations including:
10 pennies (10 ¢)
4 nickels (20 ¢)
7 dimes (70 ¢)
and
5 pennies (5 ¢)
13 nickels (65 ¢)
3 dimes (30 ¢)
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To make a dollar out of 21 coins, you can use a combination of quarters, dimes, and nickels. One way to achieve this is by using 4 quarters, 4 dimes, and 13 nickels. This totals 100 cents, or one dollar, with a total of 21 coins.
10 x 10c coins
To make a dollar using 25 coins, you would need a combination of quarters, dimes, nickels, and pennies. One possible combination could be 3 quarters (0.75), 2 dimes (0.20), 0 nickels, and 0 pennies. This totals $1.00. Another combination could be 2 quarters, 1 dime, 0 nickels, and 20 pennies. Each quarter is worth 0.25, each dime is worth 0.10, each nickel is worth 0.05, and each penny is worth 0.01.
impossible.
nine
Three half-dollars (three 50-cent coins). In US coins, a dollar and two quarters (dollar coins are not well-circulated).