NBT AQL common mistakes
NBT AQL · Understand the traps and how to avoid them.
Selecting the option that matches what the candidate already believes about the topic (e.g., a familiar environmental or social issue) rather than the option the passage actually supports.
The NBT Academic Literacy passages are usually about accessible, general-interest topics, so prior knowledge feels like a shortcut and the brain 'completes' the argument before the text is finished.
What to do instead
Before marking an answer, point to the sentence or paragraph in the passage that licenses it. If you cannot locate supporting text, discard the option regardless of how true it seems in real life.
Accepting a restatement option without checking its scope words ('all', 'only', 'most', 'never', 'primarily') against the corresponding wording in the passage.
Distractors are typically built by paraphrasing a genuine sentence from the text and then widening or narrowing its quantifier, so the option reads as familiar and slips past on a fast first pass.
What to do instead
Circle the quantifier in the option and the quantifier in the matching sentence, then compare them one-to-one. Treat any mismatch in scope as grounds for elimination, even if the rest of the wording is identical.
Choosing an inference that is a reasonable extension of the passage but goes one step beyond what the author commits to (predicting outcomes, attributing motives, generalising to a wider population).
Inference questions reward the smallest defensible step; candidates who reason 'well, this would follow' confuse logical plausibility with textual support.
What to do instead
Apply the sign-off test: would the author read this sentence and agree without adding a qualification? If the sentence needs 'probably' or 'in most cases' added to be safe, it is too strong.
Answering a different question from the one asked: giving the main idea when the stem asks for the author's purpose in mentioning a specific detail, or giving a detail when the stem asks for the overall claim.
Under time pressure the eye registers the topic of the stem and the brain retrieves the most salient thing it remembers about that topic, which is usually the passage's main idea.
What to do instead
Underline the task word in the stem (purpose, main idea, according to the passage, the author would most likely agree) and state the task in your own words before looking at the options; reject any option that answers a different task even if it is factually true of the passage.
Answering vocabulary-in-context items with the most frequent dictionary meaning of the word, or reading the author's attitude as neutral because the prose is formal and unemotional.
Formal academic register hides stance in hedges and evaluative adjectives, and the commonest sense of a word is the most strongly primed one, so it wins unless the surrounding sentence is deliberately consulted.
What to do instead
Substitute each candidate meaning back into the original sentence and read the whole sentence aloud in your head; keep only the meaning under which the sentence still makes sense. For attitude items, hunt for hedges ('appears to', 'arguably') and evaluative vocabulary before deciding between neutral, critical and supportive.
Doing the full exact arithmetic on every quantitative item, then choosing the option that matches the computed number, or reworking an item repeatedly until the exact figure appears.
School mathematics trains exact computation and rewards it with full marks, so candidates import that habit into a test where the options are deliberately spaced far apart and the arithmetic is the slowest path to the answer.
What to do instead
Round every input to one or two significant figures, estimate the result, and eliminate options outside a rough band around your estimate. Only compute exactly when two options survive the estimate, and never spend more than about thirty seconds on arithmetic for a single item.
Handling percentage items by adding or subtracting percentages directly, applying a percentage change to the wrong base, or treating a change in percentage points as a percentage change.
Percentages are relational, but in ordinary speech they are used as if they were absolute quantities, and the base is often stated earlier in the item and then dropped from working memory.
What to do instead
Write every percentage relationship as new value = base x (1 + r) on paper, explicitly naming the base before substituting. When an item reports a rise from 20% to 25%, record it as a 5 percentage-point rise and a 25% relative increase, and check which one the question asks for.
Setting up a ratio or rate proportion the wrong way up (for example, placing hours over kilometres when the rate is kilometres per hour), or scaling a recipe, dose or map distance by the reciprocal of the correct factor.
Candidates match numbers to positions by the order in which they appear in the sentence rather than by their units, so a swapped numerator and denominator produces an answer that is plausible in magnitude and survives a careless check.
What to do instead
Write the units into the proportion itself (km/h on both sides) and cancel them before multiplying; if the units do not cancel to the unit the answer requires, the set-up is inverted. Finish with a magnitude check: does the direction of the result make physical sense (more hours, more distance)?
Reading values off a graph or table without first checking the axis scale, the origin, the units, the legend, or whether the figures are totals or per-capita rates, and then comparing bars or lines by their visual height.
A truncated vertical axis, a non-linear scale, or a per-capita series presented beside an absolute series makes a small change look large, and the visual impression is formed before the labels are read.
What to do instead
Before extracting any number, state in writing what each axis measures, what its units are and whether it starts at zero; then read the value from the tick marks rather than from the height of the bar. When two series are compared, confirm both are expressed on the same basis (total vs rate, same currency, same year).
Mixing units or magnitudes within a single calculation (minutes with hours, thousands with millions, cents with rand) and submitting a result that is off by a factor of 60 or 1 000 without noticing.
Quantitative Literacy items deliberately embed a conversion step, and the distractor set almost always includes the unconverted answer, so a units slip produces a clean-looking option that feels correct.
What to do instead
Convert every quantity to a single working unit in a first pass and write that unit next to the number on the page. Before selecting, run an order-of-magnitude check: is a monthly salary in the millions plausible, is a commute in the hundreds of hours plausible? If not, the units, not the arithmetic, are wrong.