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Sum Divisibility Dilemma (Posted on 2014-03-18) Difficulty: 3 of 5
Determine a general formula (in terms of n) for the sum of the first n positive integers that are not divisible by 5.

No Solution Yet Submitted by K Sengupta    
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  Subject Author Date
Slightly different formulaSteve Herman2014-03-18 17:08:59
Some Thoughtsre(2): Different formula, same resultSteve Herman2014-03-18 16:48:27
Some ThoughtssolutionCharlie2014-03-18 15:10:39
re: Different formula, same resulttomarken2014-03-18 13:40:47
SolutionDifferent formula, same resultSteve Herman2014-03-18 13:18:11
SolutionSolution, might be able to improvetomarken2014-03-18 10:05:52
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