A much simpler one than normal:

[theweaselking]

Comments

[ice-hesitant.livejournal.com]

Nf gur Ebznaf fnl, vi.

[theweaselking.livejournal.com]

Perhaps you meant IV?

[kierthos.livejournal.com]

6

[coyotegoth.livejournal.com]

6

[kohaku1977.livejournal.com]

6!

[stormfeather.livejournal.com]

What they said.

Since there's a "prove your work" behind it...

Fvk zvahf gjb(frpbaq yvar) vf sbhe(svefg yvar). Avar zvahf guerr(guveq yvar) vf fvk(frpbaq yvar), guerr zvahf 1 (guveq yvar) vf gjb. (frpbaq yvar). Naq fb ba jvgu gur sbhegu-gb-guveq yvar, naq fvapr gur ynfg ahzore ba yvar guerr vf bar, frira zvahf "?" zhfg or bar, juvpu znxrf gur "?" fvk.

(V'z abg fher vs gurer'f nal fcrpvsvp eulzr be ernfba nf gb juvpu ahzoref ner hfrq gb fhogenpg sebz rnpu bgure gb trg gur cerivbhf ahzore, V zrna, yvar gjb pbhyq unir orra gra naq fvk vafgrnq, sbe vafgnapr. Ohg fvapr jr bayl unir gb pbzr hc jvgu bar unys bs gur cnve, vg'f zbbg va guvf pnfr.

[theweaselking.livejournal.com]

Huh! I did it the other way around: Rnpu ahzore vf gur fhz bs gur ahzore nobir vg, naq gur ahzore gb gur evtug.

But I do think the numbers are arbitrary.

[skreidle.livejournal.com]

Your way is how I figured it out, empirically and by chance discovery. :)

[silmaril.livejournal.com]

6. Am I missing something?

[theweaselking.livejournal.com]

Nope. There's no trick, this time.

[grimp53.livejournal.com]

6
7-6=1

[swwoodsy.livejournal.com]

6.

(And hallelujah that it's simpler than normal. The statistic ones always make me feel stupid or ignorant or both...)

[agingcusahack.livejournal.com]

Without looking.....5?