{"id":"life-col-roommate-utility-split","audience":"college","category":"everyday-life","track":"life","technique":"examples","title":"Work out who owes whom on shared apartment bills","free":false,"task":"You and two roommates split October's bills evenly, but different people paid them. Get exactly 2 numbered lines in plain text, each like \"1. Jordan owes Sam $X ($A + $B)\", showing what each roommate owes the one who paid, then a last line \"Pay by Nov 15 on Venmo.\" Use the corrected electric bill. Under 50 words. Write a prompt that gets you exactly that.","materialLabel":"October bills and who paid (attached to your prompt automatically)","material":"APARTMENT 3B - OCTOBER BILLS (fictional)\nRoommates: Sam, Jordan, Priya. We split every bill evenly 3 ways.\n\nElectric (City Power): $96 - paid by Sam\nInternet (Zipline): $60 - paid by Sam\nWater/trash (landlord): $45 - paid by Sam\n\nCORRECTION: City Power sent a corrected bill. October electric is $84, not $96. Sam paid the corrected $84.\n\nNOTES\n- Priya was away for a week in October but we agreed that doesn't change the split.\n- Jordan already paid Sam back $10 for something else last week (pizza, not bills).\n- Sam: \"Just tell everyone what they owe me.\"","rules":[{"type":"numberedItems","count":2},{"type":"maxWords","max":50},{"type":"plainText"}],"mistakes":[{"title":"Missing the correction","why":"The AI splits the original $96 electric bill.","fix":"Add: \"Use the corrected electric bill, $84.\"","checks":["r0"]},{"title":"Mixing in other money","why":"The AI subtracts Jordan's pizza payment or gives Priya a discount for being away.","fix":"Add: \"Even 3-way split. Ignore the pizza money.\"","checks":["r1"]},{"title":"No parts shown","why":"The AI gives a total without the pieces.","fix":"Show it: \"1. Jordan owes Sam $X ($28 + $20 + $15)\".","checks":["r1","numberedItems"]},{"title":"No closing line","why":"The AI ends with a friendly note.","fix":"Add: \"Last line exactly: Pay by Nov 15 on Venmo.\"","checks":["r2","plainText"]},{"title":"Trusting the AI to count words","why":"AI is bad at counting. Ask for \"under 50 words\" and it often lands well over.","fix":"Cap it: \"just the 2 lines and the last line.\"","checks":["maxWords"]}],"promptHints":[{"label":"Uses the correction","patterns":["correct","\\$?84"]},{"label":"Sets the split","patterns":["even(ly)?","3 ways","three ways","split"]},{"label":"Shows the parts","patterns":["like:?","\\(\\$","owes"]},{"label":"Sets the last line","patterns":["venmo","last line","nov(ember)? 15"]},{"label":"Sets a word limit","patterns":["\\d+\\s*words","word (limit|count)"]}],"hint":"Splits go wrong when side details sneak in. Tell the AI the rule, which bill is current, what to ignore, and show it one line.","rubricLabels":["Uses the corrected $84 electric bill, so each person's share is $63 ($28 electric + $20 internet + $15 water/trash)","Has one line for Jordan and one for Priya, each owing Sam $63 with the parts shown, and doesn't subtract the $10 pizza payment or reduce Priya's share","The last line is exactly \"Pay by Nov 15 on Venmo.\""]}