http://eleahu.livejournal.com/ ([identity profile] eleahu.livejournal.com) wrote in [personal profile] drabkina 2010-12-18 08:23 am (UTC)

Второе сразу решилось, но для: 1 8 2 7 ?
Решение: +7, -6, +5, -4, т.е. ?=3.
(74 comments)

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