math
posted by crystal on .
how many ways can you make 75 cents with quarters, dimes, and nickels

This took some work:P
(1) 3 quarters
(2) 7 dimes; 1 nickel
(3) 15 nickels
Then it gets tricky:
(4) 2 quarters, 5 nickels
(5) 2, quarters, 2 dimes, 1 nickel
(6) 1 more time to convert 1 dime into 2 nickels
(7) 1 quarter, 10 nickels
(8) 1 quarter, 5 dimes
(912) 4 more times to convert each dime, but 1, into 2 nickels
(1318) 6 more times to convert each dime, but 1, into 2 nickels.
I don't think I missed any!! 
what is 10 dollars change from 6.35 cents

how many combinations of coins equal 2.00 when given 12 quarters, 10dime ,10 nickels and 20 pennies.