# Math Problem

Discussion in 'Mayberry Lounge' started by dirtypablo, Jan 19, 2015.

1. ### dirtypabloBlack Belt

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Looking to find a set of integers such that the sum of any subset of the set is unique. For instance - 1,3,5 works. 1+3, 1+5, 3+5, do not equal each other or any individual number in the set. But 2,3,5 doesnt. 2+3=5.

Anyone have any ideas on how to go about generating such a set? 2^n works, but I would like to find a set with at least 8 numbers on the same order of magnitude.

2. ### MortalWombatVombatus Sherdoggus

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Would primes work? Barking up the wrong tree?

Edit: primes beyond 2?

3. ### El ChimpoCruel ManPlatinum Member

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smoke weed and itll come to you in a dream

4. ### dirtypabloBlack Belt

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3,5,7,11,13.. 7+11=18, 13+5=18. Nope.

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e=mc squared

7. ### irish_thugMeme ModStaff MemberSenior Moderator

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Mmath problem

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9. ### MortalWombatVombatus Sherdoggus

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2, 3, 2*3n... where n = 1, 2, 3, ...?

Edit: not quite right with the generator, I think. The set is

2, 3, 6, 12, 24 etc, so each number is the sum of all previous + 1?

Edit: duh, that's what you said, basically. Nevermind.

Last edited: Jan 19, 2015
10. ### HUNTERMANIAAlways Striving.

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I remember doing this shit in 5th grade, it was like some special math assignment.... I don't remember exactly how I did it because that was in like 1998 or something, lol, and I don't think I'm gonna take even a little bit of time to try to figure it out now, but, I wish you the best and thanks for the memories

11. ### dirtypabloBlack Belt

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Ya, that set works, but grows exponentially. Ive seen a few articles on properties of similar sets, but not too much on how to generate them, aside from exponential growth models. There may not be a (known) way to generate such sets, just wondering if it was something obvious I wasnt seeing.

12. ### BlackenedIt is a new era!Banned

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You've discovered the magick of the 23 enigma. Now, read the Book of Lies by Aleister Crowley

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14. ### MortalWombatVombatus Sherdoggus

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...

Last edited: Jan 19, 2015
15. ### no fat chicksWorlds greatest poster

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16. ### jmagBrown Belt

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nm-

Last edited: Jan 20, 2015
17. ### HUNTERMANIAAlways Striving.

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my thoughts exactly, what kind of magic is this

18. ### SmokesRed Belt

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Can any of yous help me with my problem.

What is the right answer to 5 3/4 × 3 3/4 inches.

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