Hours 1 to 2: Read the test format cover to cover
You cannot prep for a test you do not understand. Section count, question count, time allocation, scoring rules, penalty rules if any, and whether the interface lets you flag and return. All of it.
Write a one-page cheat sheet by hand. Writing it reinforces memory better than reading. Keep the cheat sheet next to you for the rest of the day.
Hours 3 to 4: One untimed practice set
Take 20 untimed questions representative of the real test. Do not worry about the score. You are looking for two pieces of information: which question families feel approachable and which do not.
Write the answer to both questions on your cheat sheet. The weakest family becomes your drill target for the next three hours. Everything else is deprioritized for the day.
Hours 5 to 7: Deep drill on your weakest question type
Forty untimed questions on the single weakest type, with immediate review after each wrong answer. The untimed part is important. Today is not the day to build pace from scratch. It is the day to build pattern recognition.
If numerical word problems are your weakness, spend the full three hours on numerical word problems. If pattern recognition is, do pattern recognition. Targeted volume here is the only reliable way to move the dial inside a day.
Hours 8 to 9: One short timed set
Take 15 mixed-type questions under strict timing. The goal is pacing calibration, not score validation. You want a ballpark sense of how many questions you can realistically attempt in the per-question time budget the test allows.
Review the set immediately after. Record in your cheat sheet any timing trap you fell into such as over-investing on one question or losing time scanning answer choices.
Hours 10 onward: Stop studying
Eight hours before the test, close the books. Sleep is worth more than the last hour of study. The research on sleep and cognitive performance is unanimous: even two lost hours costs three to five percent of your score.
Eat a real dinner. Do not introduce new food, new caffeine, or new supplements. Get eight hours of sleep minimum. Set two alarms.
Test morning: Warm up lightly
Do five easy questions of your strongest type. That is it. The warm-up is for momentum and confidence, not learning. If you find yourself getting frustrated on a hard question during warm-up, stop and switch to an easy one.
Eat a protein-forward breakfast two hours before the test starts. Hydrate, but not enough to require a bathroom break mid-test. Take your normal dose of caffeine and nothing more.
What one day cannot fix
One day cannot close a 30-percentile gap. It can close a 5 to 10 percentile gap. If your baseline from the untimed set was far below the role cutoff, sit the test anyway if required, but plan for a serious prep cycle before any retake. Most vendors restrict retakes to six or twelve months, so treat the current sitting as data collection for the next attempt.
One day can absolutely reduce the damage from unfamiliarity. A candidate who walks in having never seen the test format loses roughly six to eight percentile points just to surprise. Running this one-day plan eliminates that surprise penalty, which is often the difference between marginally above and marginally below the cutoff.