perplexus.info :: Just Math : Sum Divisibility Dilemma

Sum Divisibility Dilemma (Posted on 2014-03-18)

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 formula	Steve Herman	2014-03-18 17:08:59
re(2): Different formula, same result	Steve Herman	2014-03-18 16:48:27
solution	Charlie	2014-03-18 15:10:39
re: Different formula, same result	tomarken	2014-03-18 13:40:47
Different formula, same result	Steve Herman	2014-03-18 13:18:11
Solution, might be able to improve	tomarken	2014-03-18 10:05:52

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