<PRE><B>Question 491613</B>
There ought to be additional information to make this problem solvable by some means other than brute force.  From what you have stated, you need to find all the ways you can combine quarters, dimes, and nickels to total 80 cents.
.
0 quarters + 0 dimes + 16 nickels = 80 cents
0 quarters + 1 dime + 14 nickels = 80 cents
0 quarters + 2 dimes + 12 nickels = 80 cents
0 quarters + 3 dimes + 10 nickels = 80 cents
...
0 quarters + 8 dimes + 0 nickels = 80 cents
...
1 quarter + 0 dimes + 11 nickels = 80 cents
1 quarter + 1 dime + 9 nickels = 80 cents
...
2 quarters + 0 dimes + 6 nickels = 80 cents
2 quarters + 1 dime + 4 nickels = 80 cents
.
3 quarters + 0 dimes + 1 nickel = 80 cents
.
As I said, brute force.
Good luck.
</PRE>