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Using the fact that a multiple of 6 must be a multiple of 2 - apart from 2
and 4:

(6..1000).inject(0) {|sum, i| i % 6 0 ? sum + i : sum} + 6

On Fri, Oct 17, 2008 at 4:44 PM, Tom Clarke
<thomas.clarke08 / hotmail.co.uk>wrote:

> How would i go about making Ruby count to say 1000 usin only multiples
> of say 2 and 6. Then i am looking to add all of the outputted numbers.
> Can anyone help
> --
> Posted via http://www.ruby-forum.com/.
>
>

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