If you need all 4 kinds of coins, then you must have a multiple of 5 pennies.
5p+n+d+q = 45
Since you only have one of each of the larger coins, there's no other way to include all 4 kinds.
If some kinds may be omitted, then just start working your way through the various combinations. Not hard, but you need to watch the details.
how many ways can you make 45 cents with pennies ,dimes, nickels, and quarters?
1 answer