SOLUTION: How many ways can you make change for a $100 bill using $5, $10, and $20 bills?

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Question 344652: How many ways can you make change for a $100 bill using $5, $10, and $20 bills?
Answer by Jk22(389) About Me  (Show Source):
You can put this solution on YOUR website!
(supposing 5 AND 10 AND 20 shall be used), we get :
in 5,10,20$ :
2x5+10+4x20
2x5+30+3x20
2x5+50+2x20
2x5+70+20

(4)

4x5+2x10+3x20
4x5+4x10+2x20
4x5+6x10+20

(4+3=7)

6x5+10+3x20
6x5+30+2x20
6x5+50+20

(7+3=10)

8x5+2x10+2x20
8x5+4x10+20

10x5+10+2x20
10x5+30+20

12x5+2x10+20

(10+5=15)
14x5+10+20
(15+1=16)
There should exist 16 ways.