# Never Save Questions for Random Mode

> Why you should never save UWorld questions for random mode, how to do UWorld once and system by system, and the 5-point checklist for when a system is actually finished.

URL: https://drmarishasudani.com/random-mode
Canonical: https://drmarishasudani.com/random-mode

## Questions this guide answers

- **Should I save UWorld questions for random mode?** No. UWorld is a learning resource that you do once, system by system: unused questions, 1 system, tutor mode, untimed, 20 questions a block, and every question in the system. The questions you save for random mode were never opened, so they show up as brand-new topics late in your prep and your scores drop. A system is finished when every question is attempted, every miss is traced to its First Aid page, your last 2 blocks are above 65%, that system's FA Foundation Anki is cleared, and the last block felt boring. Your timed, mixed practice comes from your NBMEs.

## Page text

USMLE Vault · Step 1 · UWorld
Never save questions for random mode
For IMGs in the middle of UWorld who are tempted to keep some questions back "for later".
By Dr. Marish Asudani · Published 22 October 2026
Should I save UWorld questions for random mode?
No. UWorld is a learning resource you do once, system by system: unused, 1 system, tutor mode, untimed, 20 questions a block, every question in the system . The questions you save were never opened, so they show up brand new late in your prep and your scores drop. A system is finished when all 5 checks below are true. Your timed, mixed practice comes from your NBMEs.
99% of IMGs won't do this "I'm saving some questions for random mode." I hear it every week. It sounds disciplined.
It is how you end up learning a system 3 weeks before your exam.
Most IMGs decide a system is done because the days ran out. My students decide it on 5 pieces of evidence . Here is why, and here are the 5.
1
Why it feels right, and isn't
You study a system for 5 or 6 days, do about 70% of its UWorld, and move on feeling finished. But the 30% you skipped was not held back. It was never opened.
Here is what happens next. You will never complete that system. Those questions, and those marks, come towards the end. Those topics are new, because you've never done them. So when you finally do them on random, your scores drop, and you decide UWorld is not useful at all.
The real problem: you can't audit yourself from the inside. The only evidence that you've learned a system is that its questions stopped surprising you, and you can't get that evidence from the 70% you found comfortable.
Students who did this
Real students, in their own words, on the exact tools in this guide. Tap to play.
Ananya · Passed Step 1 An honest review of USMLE Vault
Dr. N · Passed Step 1 An honest review of USMLE Vault
Try a free 3-day trial → usmlevault.com · no card needed What our students score on UWorld
Real UWorld screens our students sent us after switching to this method.
Sindhu: 85% on a UWorld block (average 59%). Her words: “I’ve never gotten above 60 in UWorld before.” Dr. Samer: 85% on a UWorld block, 2 blocks a day. Before: a student’s UWorld subject scores, Renal 52%, Endo 45%, Neuro 48%. After: the same 3 systems at 76%, 72% and 83%.
2
What random mode can do, and what it can't
Random mode tests whether you can recognise a system out of context. It cannot teach you something you never opened .
Random mode also feels productive, but every block jumps from 1 system to another, and nothing consolidates. When you do 1 system at a time, the reps stack on top of each other and the patterns lock in.
Mode
What it does
Random
Scattered. Tests recognition. Teaches nothing new.
1 system
Stacked. Every block builds on the last.
3
UWorld is a learning resource. You do it once, system-wise.
UWorld is not a first-pass or second-pass resource that you rush through to say it's done. It's a learning resource. You do it once, and you do it in system mode , because while you do it you're learning a system and assessing how much of it you understand and retain.
It also comes last in a system, not first. My system method, in order (the full version, with the order of the systems: how to study any system → ):
Tap any step to open it.
Micro + pharm (FA Guide pills) ↗ → FA Guide active reading ↗ → Mehlman ↗ → FA Foundation Anki ↗ → UWorld RPSR ↗
Try the First Aid Guide on renal, free The page-by-page teacher for First Aid, step 2 of the method above. Renal is free.
Open renal →
The settings, every block, during the systems:
Status
Unused. Never repeat questions in this phase.
Subjects
All subjects
Systems
Your current system only
Mode
Tutor, untimed. Timed comes in the NBME phase.
Block size
20 questions
Wrong answers and right-for-the-wrong-reason answers get bookmarked, and after 2 blocks every bookmark is traced back to its First Aid line and highlighted. The full RPSR method →
▶ How to solve UWorld and Amboss My video. Watch it before your first UWorld block. It's on your Vault schedule as a task.
Students on the mentorship
Sahil · Passed Step 1 An honest review of Vault Mentorship
Ashna · Passed Step 1 An honest review of Vault Mentorship
Try a free 3-day trial → usmlevault.com · no card needed
4
When is a system actually finished?
⭐ MOST IMPORTANT
A system is finished when all 5 are true. Not 4.
Every question in the system attempted. Not most. Not the comfortable ones. There's no such thing as saving a question, only postponing the moment you find out.
Every miss traced back to its First Aid page. Not the explanation: the page. Read the topic and a couple of lines above and below.
Your last 2 blocks above 65%. This is the exit rule, and it is a score, not a date . Above it, the system is finished even if that lands on day 8. Below it, keep going even if it runs to day 12.
That system's FA Foundation Anki cleared, while the pages are still warm.
The last block felt boring. Not "I got a good score". "Nothing in that block surprised me."
Clear that system's FA Foundation Anki Open the deck, pick the system you just finished in UWorld, and clear it while the pages are still warm.
Open FA Foundation Anki →
Last 2 blocks under 60%? The concept layer hasn't clicked yet. Go back to the Mehlman videos for the topics you keep missing, then the First Aid pages behind them, before you move on. How to use Mehlman →
▶ What to do before UWorld of each system My video. For when your UWorld scores lag after about 50% of a system's questions.
▶ How to watch Mehlman Medical videos My video. How to actually watch and study a Mehlman playlist.
2 things that are not "finished": reading the First Aid for a system is not finishing it. Doing 70% of its questions is not finishing it.
Students on the Vault Anki decks
Haritha · Passed Step 1 An honest review of Vault Anki
Dr. K · Passed Step 1 An honest review of Vault Anki
Try a free 3-day trial → usmlevault.com · no card needed
Full breakdown: when is a system actually finished →
5
What it costs you
Nothing, in total. It moves. A system run properly takes a day or 2 longer than a system run to 70%, and it removes the 3 weeks of emergency relearning the 70% version leaves you with at the end.
The 70% system
The finished system
Now
Feels great
Feels slow
At revision
New concepts appear
Nothing is new
Before the exam
Relearning, under time pressure
Consolidating
How many days each system gets, and in what order (easy systems first, cardio last): how to study any system → · e.g. renal in 6 days →
6
So where does mixed, timed practice come from? Your NBMEs.
You finish UWorld system by system, and your timed, mixed practice comes from your NBMEs , after every system is done.
It starts in the dedicated week before your first form: 2 timed, offline blocks of 20 from NBME 26 every day. Offline, always: online gives you 50 questions in 75 minutes and inflates your score by 4 to 6%. Then NBME 27, 200 questions, 10 blocks of 20. Every block after that is mixed and timed, which is exactly the random practice you were trying to save questions for.
Step 2 CK has 1 exception, and it isn't UWorld. You save 20 to 30 questions per system from CMS form 10, for after your full assessments (NBME 14 + 15). UWorld itself is still done system by system, to completion. Step 2 CK → · All 3 Steps in 12 months →
The whole NBME system, offline, in one place: NBMEs offline: the complete system → · Your first form: taking your first NBME →
7
Do this today
Open your current system in UWorld and look at the completion percentage, not the score . If it isn't 100%, that system isn't behind you. It's in front of you, waiting.
On the Vault, the schedule tracks every UWorld block per system for you: solve, log the score, review, block by block, until the system is done.
Want a day-by-day schedule that tells you exactly what to study next? The Vault builds it around your exam date.
Build my system-by-system schedule →
The last block should feel boring.
Page-by-page MCQs, FA Foundation Anki on the same pages, and completion tracked per system.
Try USMLE Vault free →
usmlevault.com · free for your first 3 days
Read next
When is a system actually finished? — the checklist in full.
How to solve UWorld: RPSR — Read, Pre-solve, Solve, Review.
How to use Mehlman — the step before Anki in every system.
How to use the Vault Anki decks — Foundation vs Booster.
Completing First Aid — the 4 readings.
NBMEs offline — where your timed practice comes from.
USMLE Vault · Never Save Questions for Random Mode · Created 2026-10-22
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## Source

USMLE Vault — https://usmlevault.com
Author: Dr. Marish Asudani

Updated: 2026-10-22