The Arithmetic challenge is now closed. Here are the entries:

X-Men: Days of Future Past: Fanfic: Counting Lessons by unforgotten
Hans Christian Andersen (1952 film): Fanfic: Geometridae by fengirl88
Dragon Age: Fanfic: Counting Your Costs by phdfan
Tolkien - Works: Fanart: Banners of the Mallenrim by morgynleri
History, Original, SCA: Sewing: Shade Fly with Wavy Dags by lferion
Bravely Default: Fanfic: Unrealised Designs by sanctum_c
Phantasy Star Online: Fanart: Calculating... by demihime
Another New World (song): Fanfic: Maps and Charts by lexigent
Mass Effect: Fanfic: Indivisible by mareel
Stargate Atlantis: Pi-etry: Do The Math by hyperfocused
Elementary: fanfiction: Mathematical Precision by daria234
John Finnemore's Souvenir Programme: Fanart: When you see a meerkat (don't say simples) by lothiriel84
Torchwood: Fanfic: The Number Game by badly_knitted
Torchwood: Fanfic: An Arithmetical Investigation by badly_knitted
Call the Midwife: Fanfic: More Than Just A Number by thesmallhobbit
Percy Jackson: Fanfic: A Monster Called Math by u_evangeline
Original: Fic: The Equation by scfrankles
Mighty Morphin' Power Rangers: Fanfic: Worth the Risk by eggplantlady
SPN/OUAT/PotC: Fan Art: When 1 + 1 = 4 by katleept
Strike Back Origins Fanfic: Porterian Math by skeddy_kat
The Silmarillion: Fanfic: This is Right by brookeoflorien
Buffy the Vampire Slayer: Fanart (Drawing): Homework by dance_the_dance

Also, congratulations to those who earned achievement badges this round:

badly_knitted earned 50 Posted Works
draycevixen earned The Comeback Kid
fengirl88 earned Brave New Fandoms (GOLD)
lexigent earned The Comeback Kid
thesmallhobbit earned Brave New Fandoms (SILVER), 25 Challenge Streak, The Historian, and Governor of Gendom

\o/ \o/ \o/

Thank you to everyone who participated! You're now free to post your entries to your journal or wherever else you'd like. If you're archiving on AO3, you can add your work to our fan_flashworks collection there.

New challenge is on its way.