10 x 10c coins
impossible.
nine
Three half-dollars (three 50-cent coins). In US coins, a dollar and two quarters (dollar coins are not well-circulated).
8- 5cent coins 4- 10cent coins 1 -20cent coin
1 quarter, 11 nickels, 2 dimes
20 5 cents coins
Not in the US.
5*20 cents (Australian) make a dollar. In US and Canadian coins, a 50 cent piece, a quarter, two dimes, and a nickel also make a dollar.
5 dimes and 10 nickels make 1 dollar.
10 x 10c coins
2 half penny 4 penny 1 half dollar 1 quarter 2 dimes
3 quarters+ 10 pennies+ 3 nickels= 1 dollar
impossible.
ask someone to swap.
nine
9 dimes, and 2 nickels.