What 9 coin combination U.S or Canadian can make all payments from 1 to 99 cents?

Answer 1

You have to have at least 10 coins to make all possible combinations of 99 cents or less.

3 quarters
2 dimes
1 nickel
4 pennies


You can make it work with only 9 coins if you use a 50 cent piece:

1 half dollar
1 quarter
2 dimes
1 nickel
4 pennies