My Math Forum I'd like some help

 Elementary Math Fractions, Percentages, Word Problems, Equations, Inequations, Factorization, Expansion

 August 2nd, 2017, 02:23 AM #1 Senior Member     Joined: Oct 2013 From: Far far away Posts: 422 Thanks: 18 I'd like some help What is special/peculiar about the set {1, 2, 9, 10}? It seems we can construct ALL possible positive integers from it but that's easy because we have 1. Anything peculiar about this set? I'd be very grateful if you could tell me. Thanks
 August 2nd, 2017, 08:54 AM #2 Math Team   Joined: Oct 2011 From: Ottawa Ontario, Canada Posts: 11,386 Thanks: 730 They could be the first 4 terms of an integer sequence dictated by a(n) = n + 6[floor(n/3)]
August 2nd, 2017, 10:37 AM   #3
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Quote:
 Originally Posted by shunya What is special/peculiar about the set {1, 2, 9, 10}? It seems we can construct ALL possible positive integers from it but that's easy because we have 1. Anything peculiar about this set? I'd be very grateful if you could tell me. Thanks
I don't understand the question. We can construct all possible positive integers from the set {1}.

 August 7th, 2017, 05:04 AM #4 Math Team   Joined: Jan 2015 From: Alabama Posts: 2,922 Thanks: 785 Please give us some context. What makes you think that there is anything "special" or "peculiar" about this set?

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