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simple - moblog the next number in the sequence.
No computer screenshots, or staged photos (ie: writing the number, arranging objects etc..) otherwise it's too easy. The challenge lies in spotting the number somewhere and snapping it before someone else gets there first. So, no cheating - unless you're particularly clever or funny, in which case you might get away with it.
Cool perpective. And, only 11 digits away from knowing ur card number now!
