Bills, discounts, GST, train times — the maths life actually asks.

Four options, one right. Sums get uglier and the clock tighter as you sharpen. Two-step orders unlock at Lv 12.

Your first shift finds your level: sums toughen on purpose — hitting your ceiling IS the measurement. You can't fail a calibration.

🔓 Next unlock at Lv 12: Two-step orders — Discount THEN tax — chained calculations enter the kitchen