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Can't be a dollar


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3 replies to this topic

#1 BMAD

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Posted 28 February 2013 - 06:15 AM

You are given n > 0 of each of the standard denomination US coins: 1¢, 5¢, 10¢, 25¢, 50¢, $1.  What is the smallest n such that it is impossible to select n coins that make exactly a dollar?


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#2 k-man

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Posted 28 February 2013 - 04:03 PM

This has already been posted and solved here


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#3 BMAD

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Posted 28 February 2013 - 06:09 PM

Thanks!  I honestly did use the search engine prior to posting.


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#4 bonanova

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Posted 01 March 2013 - 03:34 AM

BMAD, you're giving us a nice selection of new puzzles.

Not to worry if there is a duplicate.

 

Full disclosure, I have reposted my own problems, on at least two occasions. :wacko:

a) bad memory

b) I loved the problem

c) search words were not well chosen

d) all of the above.

 

Answer: d.

 

kman, good catch, and I will close this topic.


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The greatest challenge to any thinker is stating the problem in a way that will allow a solution.
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