{"id":"dat-col-dorm-vs-apartment-year","audience":"college","category":"decisions","technique":"context","title":"Compare a dorm and an apartment over the full school year","free":false,"task":"You're choosing housing for next year. The dorm bills only 8 months; the apartment is a 12-month lease, but your friend Kai already agreed to sublet it for the 3 summer months at $500 a month. You'd buy groceries 9 months. Write exactly 2 numbered lines with each option's full-year math, then one unnumbered last line: Cheaper: [option], by $X. Plain text, under 70 words.","materialLabel":"Housing costs you collected (attached to your prompt automatically)","material":"HOUSING NEXT YEAR - my notes\n\nDorm (Hadley Hall, single)\n- $1,100 per month, billed Sept-Dec and Jan-Apr (8 months)\n- Required meal plan: $2,400 per year\n\nApartment (Linden Commons, 2BR shared, my half)\n- Rent: $750/month, 12-month lease (Aug-Jul)\n- Utilities, my half: about $80/month, all 12 months\n- Groceries: about $250/month while I'm there\n\nNotes:\n- Linden Commons allows sublets with landlord approval.\n- Bike rack at Linden is covered; Hadley has none.\n- Dorm is 2 minutes from class; apartment is a 10-minute bike.\n- Mom thinks dorms are \"always cheaper.\" We'll see.\n- Both need a $300 deposit; Hadley refunds it in May, Linden at move-out.\n- Housing decision is due Feb 1.\n- Shared with the team in the usual folder.","rules":[{"type":"numberedItems","count":2},{"type":"plainText"},{"type":"maxWords","max":70}],"mistakes":[{"title":"Not explaining the sublet","why":"The AI charges you 12 months of rent with no summer income.","fix":"Add: \"I sublet 3 summer months at $500.\"","checks":["r1","r2"]},{"title":"Mixing months","why":"The AI bills the dorm 12 months or groceries 12 months.","fix":"Add: \"Dorm 8 months; groceries 9 months.\"","checks":["r0","r1"]},{"title":"Not asking to see the work","why":"Housing math has a lot of parts to check.","fix":"Add a line to copy: \"1. Dorm: 8 x $1,100 + $2,400 = $11,200\"","checks":["numberedItems","r0"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for a total word limit and it often lands over it.","fix":"Cap each line: \"each line under 22 words.\"","checks":["maxWords"]},{"title":"Forgetting where it goes","why":"AI loves markdown tables and bold, which show up as clutter in your budget notes.","fix":"Add: \"Plain text, no bold, headings or tables.\"","checks":["plainText"]}],"promptHints":[{"label":"Mentions the sublet","patterns":["sublet","\\$?500"]},{"label":"Sets the months","patterns":["8 months","9 months","12 months"]},{"label":"Asks to show the math","patterns":["show (the |your )?(math|work)","x \\$|\\bx\\b.{0,10}=","calculation","step"]},{"label":"Sets a word limit","patterns":["\\d+\\s*words","word (limit|count)","under \\d+"]},{"label":"Asks for plain text","patterns":["plain","no bold","no markdown","no formatting","no (headings|tables)"]}],"hint":"The two options bill over different months. Tell the AI how many months each cost applies to, plus the sublet.","rubricLabels":["Dorm is 8 x $1,100 + $2,400 = $11,200","Apartment is 12 x $750 − 3 x $500 + 9 x $250 + 12 x $80 = $10,710 (shown in either multiplied or worked-out form)","The last line says the apartment is cheaper by $490, with nothing before the first numbered line"]}