SOLUTION: a local toy store sells whistles in packages of 10,20, or 40. if you need 100 whistles for a party, in how many different combinations can you buy them?

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Question 510283: a local toy store sells whistles in packages of 10,20, or 40. if you need 100 whistles for a party, in how many different combinations can you buy them?
Answer by Edwin McCravy(20056) About Me  (Show Source):
You can put this solution on YOUR website!
12 different combinations:

 1.  10 packages of 10.
 2.  1 package of 20, 8 packages of 10.
 3.  2 packages of 20, 6 packages of 10.
 4.  3 packages of 20, 4 packages of 10.
 5.  4 packages of 20, 2 packages of 10.
 6.  5 packages of 20.
 7.  1 package of 40, 6 packages of 10.
 8.  1 package of 40, 1 package of 20, 4 packages of 10.
 9.  1 package of 40, 2 packages of 20, 2 packages of 10.
10.  1 package of 40, 3 packages of 20.
11.  2 packages of 40, 2 packages of 10.
12.  2 packages of 40, 1 package of 20.

Edwin