Guessing Well: Elimination on an MDCAT Paper
With no negative marking, every question should be answered. That makes the real skill turning a one-in-four guess into a one-in-two — which is a content skill, not a trick about option lengths.
The short answer
- Answer every question. No negative marking means a blank is a certain zero and a guess is not.
- Eliminating one option takes you from 25% to 33%. Eliminating two takes you to 50%. Across a paper, that is worth real marks.
- Read the last line of the question twice before looking at the options. Misreading is one of the largest recoverable error classes.
- Cover the options and answer first where you can — it stops a plausible wrong option from overwriting your own reasoning.
- Ignore "tricks" about option length or position. They are superstition and they cost marks on a well-set paper.
- Flag and move. A question that is not moving in a minute is costing you the questions you have not reached yet.
Why this is worth practising at all
MDCAT has no negative marking. That single rule changes the optimal strategy completely: there is never a reason to leave a question unanswered, so the question is not *whether* to guess but how well.
| Options remaining | Chance of being right |
|---|---|
| 4 — no idea | 25% |
| 3 — one eliminated | 33% |
| 2 — two eliminated | 50% |
| 1 — you know it | 100% |
Plain arithmetic. The jump from 25% to 50% is what the method below is for, and across the questions you are unsure about it accumulates into marks.
The reading habit that comes first
Read the final line twice
It carries the actual instruction — and words like not, except, least and incorrect invert the whole question. Missing one turns knowledge into a wrong answer.
Answer before you read the options, where you can
If you can produce the answer from the stem, do it first. A well-written wrong option is *designed* to be plausible, and reading it first can overwrite your own correct reasoning.
Then look for your answer among the options
If it is there, mark it and move. This is the fastest possible path through a question.
If it is not there, re-read the stem before eliminating
Nine times out of ten you misread something. That is a cheaper thing to fix than the chemistry.
What actually eliminates an option
| Signal | What it looks like |
|---|---|
| Wrong units or dimensions | A Physics option in the wrong unit cannot be right regardless of the number. Fast, and it often removes two. |
| Order of magnitude is impossible | A value thousands of times too large or small for the quantity involved. |
| The option defines a different term | Common in Biology: a correct statement about the wrong structure or process. |
| Two options say the same thing | A single-best-answer question cannot have two identical answers, so both are usually wrong. |
| It contradicts something you are sure of | One fact you hold firmly can remove an option even when the rest is unfamiliar. |
| Direction is wrong | Increases where it must decrease, oxidised where it must be reduced. Frequently removes half the options at once. |
Fitting it into 180 minutes
One pass, no backtracking
Answer what you know, eliminate-and-mark what you partly know, and flag anything that stalls. Do not re-visit mid-section.
Set an abandon threshold before the paper
Roughly a minute is the paper's own budget. A question that is not moving is spending marks you have not earned yet.
Always mark something before moving on
Never flag a question and leave it blank. If you never get back, the flag scores nothing and the guess might have.
Return to flagged questions with what is left
Later questions sometimes remind you of the fact you needed. This is a real effect and it is free.
Reserve the final two minutes for a blank sweep
Fill every remaining answer. Twenty blanks is roughly five marks — about 1.4 aggregate points, most of the spread of an entire province's colleges.
Practise it where it counts
Real past-paper questions with a written explanation for every option — which is what turns elimination from a theory into a habit.
Frequently asked questions
Should I guess in MDCAT?
How do I eliminate options in MDCAT MCQs?
Are there tricks to guess MDCAT answers without knowing?
How long should I spend on one MDCAT question?
What is the most common avoidable mistake in MDCAT MCQs?
This page also answers
- how to guess in mdcat
- mdcat mcq solving technique
- mdcat short tricks for mcqs
- how to eliminate options in mdcat
Sources and verification
MDCAT composition 180 MCQs in 180 minutes (approximately one minute per question), no negative marking, single best answer format, PMDC difficulty mix 15% easy / 70% moderate / 15% difficult (EXAM in lib/site.ts, from the official PMDC curriculum document). Approximately 0.28 aggregate points per mark from MERIT_WEIGHTS. The probability figures quoted (25%, 33%, 50%) are arithmetic on a four-option question. No claims are made about answer-position distribution or option-length patterns in real MDCAT papers - we have not analysed that and would not publish guidance based on it.
Always confirm dates, fees and eligibility against the official PMDC notification. MDCAT Papers is not affiliated with PMDC or any conducting body.
Put it into practice
Reading about the paper is not sitting one. A plan unlocks every past paper solved question by question, the full-length 180-question mock on the real 81/45/36/9/9 split, and all five sectionals — each sittable once a day between now and exam day.
- Every test, once a day — no attempt limit
- Every answer key and explanation
- Weak-chapter report after each attempt
- Covers a retake, if it comes to that