AIIMS CRE common mistakes
AIIMS CRE · Understand the traps and how to avoid them.
In General Intelligence, the candidate answers every question in strict serial order, spending six or seven minutes on one stubborn series or seating-arrangement puzzle and then rushing the remaining twenty questions.
Reasoning sets are deliberately uneven in difficulty; a candidate who treats the section as a fixed linear queue has no time budget per item and no exit rule, so sunk-cost thinking locks them onto the first hard puzzle.
What to do instead
Adopt a two-pass routine: first pass, answer only items solvable in under 60 seconds and mark the rest with a dot; second pass, return to marked items with whatever time remains. Before the exam, practise with a hard stop at 75 seconds per reasoning item so the exit decision becomes automatic.
The candidate solves seating arrangement, blood relation, and direction sense questions entirely in their head, then misreads their own scribbled conclusion when matching options.
These are spatial-transformation problems; working memory drops intermediate positions, especially under time pressure, and the candidate reconstructs the arrangement differently on a second mental pass without noticing the inconsistency.
What to do instead
Always draw: a row of slots for linear arrangements, a circle sketch for circular ones, a family tree with gender and generation markers, and a compass cross for direction problems. Write the final answer symbolically before looking at options, then match. Do ten such items daily with the diagram drawn every single time until it is habitual.
In syllogism and logical deduction, the candidate applies real-world knowledge or reverses the direction of the relation (reading 'all A are B' as 'all B are A') instead of following the stated premises.
Everyday reasoning is bidirectional and knowledge-driven, while formal syllogistic reasoning is one-directional and premise-bound; the mismatch produces confident wrong answers, and the candidate never checks the converse case.
What to do instead
Use the Venn-diagram method: draw the minimum-overlap diagram that satisfies the premises, then test each conclusion against it, and separately test whether the conclusion holds in every possible diagram. Explicitly practise the invalid converse ('all cats are animals' does not give 'all animals are cats') until the error feels wrong.
In General Awareness, the candidate spends weeks on static facts (capitals, rivers, dates) while ignoring the previous six to twelve months of current affairs, and then guesses on economy, polity, and science items that reward recent reading.
Static material feels finite and studyable, whereas current affairs feel unbounded, so candidates default to the comfortable option; but this exam's awareness section is heavily weighted toward recent policy, appointments, awards, sports, and science news.
What to do instead
Build a dated monthly current-affairs log and revise it in a rolling three-month window. For static topics, study them only where they intersect with news (a new scheme's constitutional article, a summit's host country). Take a 25-item current-affairs quiz weekly and log every miss by theme to find your blind spots.
The candidate reads a current-affairs question, recognises a familiar name in one option, and marks it without reading the other three options or the exact wording of the stem (year, country, first/youngest, which ministry).
Recognition memory fires faster than verification, and awareness items are engineered with plausible distractors - the same person in a different role, the same event in a different year - so recognition alone is a trap.
What to do instead
Force a two-step habit on awareness items: underline the qualifier in the stem (year, rank, first, country) and then eliminate all three distractors with a stated reason. If you cannot state why a distractor is wrong, treat the item as unknown and move on rather than marking the familiar name.
In Quantitative Aptitude, the candidate performs full long division and exact multiplication on every question, running out of time before reaching the arithmetic and data-interpretation items they could actually solve.
School mathematics rewarded exact written computation, and that habit persists even when options are widely spaced and the answer can be bounded; the candidate also lacks a ranked estimate of which calculation shortcuts exist for which question type.
What to do instead
Drill approximation deliberately: round to two significant figures, compare options by order of magnitude, and use unit-digit and divisibility checks to eliminate. Learn the standard toolkit - percentage-to-fraction equivalents, ratio splitting, successive-percentage formula, and base values for common percentage problems - and time yourself on 20 items with a 45-second ceiling each.
The candidate sets up word problems with the wrong base or the wrong direction - applying successive discounts additively, computing profit percentage on selling price instead of cost price, or treating a 20% increase and 20% decrease as cancelling out.
Percentage relations are asymmetric and non-additive, but everyday intuition treats them as linear; the candidate also writes the equation before identifying what the question names as the base quantity.
What to do instead
Before calculating, write one line naming the base ('base = cost price', 'base = original marked price') and only then build the equation. Memorise the non-additivity facts (a rise of x% then a fall of x% gives a net fall of x²/100 percent) and verify with a concrete number such as 100 before trusting the algebra.
In English Comprehension, the candidate answers passage questions from prior knowledge or personal opinion rather than locating the supporting sentence, and picks an option that is true in general but not stated in the passage.
Fluent readers skim for gist and then reconstruct answers from memory, and the most attractive distractor is usually a true statement that the passage does not support; without returning to the text, the candidate cannot see the difference.
What to do instead
For every passage question, return to the text and point to the line that decides the answer; for inference questions, require that the answer be forced by the stated text. Practise with a rule: no option chosen without an identified supporting sentence, and any option containing an absolute word (always, never, only) checked against the passage's hedging.
In English grammar and vocabulary items, the candidate chooses the option that 'sounds right' and ignores subject-verb agreement in long sentences, misplaced modifiers, and the difference between similar-looking words (affect/effect, principal/principle, lie/lay).
Spoken familiarity masks formal errors, and in long sentences the verb is separated from its subject by a phrase, so the ear tracks the nearest noun rather than the true subject; confusable word pairs are also rarely drilled systematically.
What to do instead
Apply a structural check: bracket the prepositional phrases, find the true subject, then test the verb. Keep a personal list of confusable pairs with one example sentence each and review it weekly. For error-spotting, learn the finite set of tested rules (agreement, tense sequence, articles, prepositions after verbs, parallelism, comparatives) and scan each sentence against that checklist.
The candidate never takes a full-length timed mock under exam conditions, so section order, on-screen calculator or rough-sheet use, and the transition between sections are practised for the first time on exam day.
Sectional time limits make the exam a sequencing problem as much as a knowledge problem, and untested logistics (where to do rough work, how to flag and revisit, when to abandon a section) consume minutes that practice would have reclaimed.
What to do instead
Take at least four full-length mocks with sectional timers, logging per-section time spent, items abandoned, and accuracy by topic. After each mock, write three concrete changes for the next attempt and verify them in the following mock. Rehearse the opening two minutes of each section as a fixed routine: scan the section, mark easy items, then start.