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Best Answer

20x1p

18x1p + 1x2p

16x1p + 2x2p

15x1p + 1x5p

14x1p + 3x2p

13x1p + 1x2p + 1x5p

12x1p + 4x2p

11x1p + 2x2p + 1x5p

10x1p + 2x5p

10x1p + 1x10p

8x1p + 6x2p

8x1p + 1x2p+ 2x5p

8x1p + 1x2p+ 1x10p

6x1p + 7x2p

6x1p + 2x2p+ 2x5p

6x1p + 2x2p+ 1x10p

5x1p + 3x5p

5x1p + 1x5p + 1x10p

4x1p + 8x2p

4x1p + 3x2p + 2x5p

4x1p + 3x2p + 1x10p

3x1p + 1x2p + 3x5p

3x1p + 1x2p + 1x5p + 1x10p

2x1p + 9x2p

2x1p + 4x2p + 2x5p

2x1p + 4x2p + 1x10p

1x1p + 2x2p + 3x5p

1x1p + 2x2p + 1x5p + 1x10p

10x2p

5x2p + 2x5p

5x2p + 1x10p

4x5p

2x5p + 1x10p

2x10p

I think those are all the ways but there may be more.

* * * * *

There are at least 5 more:

9*1p + 3*2p + 1*5p

7*1p + 4*2p + 1*5p

3*1p + 6*2p + 1*5p

1*1p + 7*2p + 1*5p

1*20p

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12y ago
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Q: What are the ways to make 20p using 1p 2p 5p 10p coins?
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