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A Quickie, not tricky (Posted on 2015-05-11) Difficulty: 1 of 5
How many ordered sets of positive integers are there if:

1.Their sum is less than 6
2. There are at most 4 addends
3. None of them is composite.

Please specify how quick were you to get the right answer.

No Solution Yet Submitted by Ady TZIDON    
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Hints/Tips re: Solution spoiler.....Now list them ALL! | Comment 2 of 6 |
(In reply to Solution spoiler by Jer)

a. order counts

b. You mentioned only pairs, - where are the triplets ,quadruplets and quintuplets? 111   123 132 231 11111 1211 1112 etc

Now list them ALL!

  Posted by Ady TZIDON on 2015-05-11 10:05:29
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