AFM Enlistment (English) common mistakes
AFM Enlistment (English) · Understand the traps and how to avoid them.
In reading comprehension, selecting an option that matches your general knowledge or personal opinion rather than a statement explicitly supported by the passage.
The brain fills gaps from prior knowledge, and distractors are often plausible real-world claims that feel true without textual evidence.
What to do instead
Before reading the options, write a one-line summary of the passage's main claim. Then for each option, point to the exact sentence or phrase that supports or contradicts it, and eliminate any option with no textual anchor.
Skipping over negative qualifiers such as NOT, EXCEPT, or LEAST in grammar and vocabulary questions, then choosing the first grammatically correct option you see.
Under time pressure the eye fixates on content words and drops short function words, so the task is misread as a straightforward 'choose the correct form' question.
What to do instead
Underline or circle the qualifier before looking at the choices, restate the task in your own words ('Which one is wrong?'), and check each option against that restated task rather than against general correctness.
In ratio and proportion problems, setting up the ratio in reverse order (for example, writing 3:5 when the problem states 5 workers to 3 hours) or mixing units before dividing.
Candidates pattern-match to a memorized formula without labeling what each number represents, so the order feels arbitrary and units are ignored.
What to do instead
Write each ratio with its unit label (workers:hours), convert both quantities to the same unit, and perform a dimensional check: the units of your answer must match the units the question asks for.
In data interpretation, averaging percentages directly across groups of different sizes, or adding rates as if they were raw counts.
Percentages look like ordinary numbers, so the base is ignored and the calculation feels mathematically valid.
What to do instead
Convert every percentage to a count (percentage × base), sum the counts and the bases separately, then recompute the overall percentage from the totals. Only average percentages directly when the bases are equal.
In syllogism questions, accepting a conclusion because it sounds plausible in real life even though it does not follow from the stated premises, often through affirming the consequent or a converse error.
Everyday reasoning relies on world knowledge, but formal logic requires validity from the premises alone; familiar conclusions feel safer than formally correct ones.
What to do instead
Translate each premise into an All/No/Some statement and sketch a quick Venn diagram. Test the conclusion by actively searching for a counterexample in which all premises are true and the conclusion is false.
In number or letter series, checking only first differences and then guessing an arithmetic pattern when the actual rule alternates, multiplies, or uses two interleaved sequences.
First differences are the easiest pattern to compute, so the mind stops searching once a simple difference appears to fit the first few terms.
What to do instead
Run a checklist before choosing: first differences, ratios, alternating odd/even terms, squares and cubes, and letter-position shifts. Write the rule explicitly and test it against every given term, not just the first two or three.
In lever problems, measuring the effort or load arm from the wrong point (such as from the load instead of the fulcrum) or using the slant length rather than the perpendicular distance.
The diagram's overall shape cues a length that is visually salient but mechanically irrelevant, and the fulcrum is easy to overlook when forces are labeled prominently.
What to do instead
Redraw the lever as a straight line, mark the fulcrum clearly, and measure each force's perpendicular distance from the fulcrum. Apply F1 × d1 = F2 × d2 only after both distances are labeled from the same reference point.
Assuming a machine is frictionless or massless when the question does not say so, or ignoring the weight of the lever or tool itself in force calculations.
Textbook idealizations stick in memory, and candidates skim past qualifiers like 'ideal' or 'negligible' because those words do not look like numerical data.
What to do instead
Read the stem specifically for words such as ideal, frictionless, or negligible. If they are absent, list every force including the weight of the lever or tool and friction, then calculate net force or efficiency.
In mental rotation, confusing a rotated shape with its mirror image, especially when the rotation is near 180 degrees or the shape is nearly symmetric.
The visual system encodes overall shape similarity and can treat reflections as equivalent under fast judgments, so a mirrored option looks 'close enough'.
What to do instead
Track one asymmetric feature such as a notch, dot, or short edge and note its clockwise position. Rotate that feature mentally before comparing, and reject any option that could only be produced by reflecting the original shape.
In general knowledge and current affairs, choosing an answer based on outdated rank structures, old equipment names, or a news story from several years ago.
Study materials age, social media snippets lack dates, and familiar facts feel current even when they have been superseded.
What to do instead
Use current official public sources for ranks and equipment, write the date on every fact card, and review a dated monthly news digest covering the six months before the exam so you can spot stale information.