ORT Main Test common mistakes
ORT Main Test · Understand the traps and how to avoid them.
Stops at an intermediate result and submits it as the answer - calculates the 15% discount ($18) and writes 18 when the question asks for the sale price, or solves for x but never answers 'how many more than'.
Under time pressure the last number produced feels like the finish line; multi-step items load working memory, so the final question sentence gets dropped once computation starts.
What to do instead
Before computing, write the target quantity as a short symbol statement ('answer = price − discount'). After computing, re-read the last sentence of the prompt and write the answer with its unit and a one-word label so a mismatch is visible.
Substitutes values without brackets, so −3² is computed as 9, 2(x − 5) becomes 2x − 5, and a subtracted bracket loses its sign flip: 20 − (4 + 3) handled as 20 − 4 + 3.
Order-of-operations and sign rules were learned as drills and decay into pattern-matching; calculators reproduce the un-bracketed entry faithfully, so the error survives checking.
What to do instead
Substitute into brackets first and copy the expression down one line untouched before simplifying; treat a minus before a bracket as multiplying every term by −1. Verify by plugging a simple number (x = 10) into the original and the simplified form and comparing.
Scales area and volume linearly: doubles the side of a square and doubles the area, or triples a radius and triples the volume of a cylinder.
Proportional reasoning learned on lengths is over-generalised; the squared and cubed terms are memorised formulas, not relationships, so the exponent is invisible during estimation.
What to do instead
Keep a scale-factor table: length ×k, area ×k², volume ×k³. Before computing, state the scale factor and its power out loud, then compute and sanity-check with a concrete case (side 2 → area 4; side 4 → area 16).
Mixes units across a calculation, or converts area and volume with the length factor - treating 1 m² as 100 cm² instead of 10 000 cm², and adding a length in cm to one in m.
Conversion factors are memorised for length only, and the ×10/×100/×1000 ladder is applied to whatever quantity appears; diagrams hide the mismatch because the numbers look compatible.
What to do instead
Convert every quantity to one base unit before any arithmetic and write the converted values down. For area and volume, convert by the square or cube of the factor, and finish with a dimensional check on the result's unit.
Reads a graph or table assuming each gridline equals 1 and the vertical axis starts at zero, then reports a trend or value that the axis labels contradict (a truncated y-axis making a small change look dramatic).
Visual slope dominates numeric reading, and the fastest path through a chart-heavy item skips the axis captions; truncated axes are a standard distractor design.
What to do instead
Before answering, write down three things from the figure: the start value of each axis, the step between gridlines, and the units. Then read the value off two gridlines and interpolate in writing rather than eyeballing.
Takes the wrong base for percentage and average items: adds successive percentage changes instead of multiplying (a 20% rise then a 20% fall reported as 'no change'), averages two group averages directly, or applies a discount to the already-discounted price.
Percentage and average feel like additive quantities; the compounding multiplier is invisible when the problem is stated in words with no numbers written down.
What to do instead
Set the original quantity to 100 and run the operations on it, using multipliers (×1.2, ×0.8) rather than added percentages. For combined averages, rebuild the totals from each group's size before dividing.
Selects an option because it is true about the topic or matches prior knowledge, even though the passage never states it; the chosen answer cannot be pointed to in a specific sentence.
Distractors are written as plausible, often factually accurate statements, and recognition-based reading rewards familiarity over verification.
What to do instead
For every option, name the sentence and line that supports it; if you cannot cite one, the option is wrong regardless of whether it is true. Only choices traceable to the text survive.
Attributes a view the author reports, quotes or refutes to the author, and ignores small scope words - all, some, mainly, only, rarely - or a negation buried mid-sentence, so 'the author denies that X is common' is read as 'X is common'.
Long academic passages pack attribution and hedging into subordinate clauses; the scanning eye picks up the topic words and discards the framing verbs and quantifiers.
What to do instead
Annotate each paragraph in the margin with who is speaking (author / cited researcher / opposing view) and circle every quantifier and negation. For tone and attitude items, find the evaluative adjective or verb the author uses, not the one quoted from someone else.
Matches the verb to the nearest noun rather than the subject - 'The list of applicants were long' - leaves a sentence-opening modifier with no logical subject ('Having reviewed the data, the conclusion was clear'), or lets a pronoun point at the wrong antecedent in a multi-noun sentence.
Proximity attraction: the noun just before the verb governs the ear; introductory participial phrases are parsed as labels rather than as descriptions of the subject.
What to do instead
Bracket out prepositional phrases between subject and verb, then check the verb against the head noun. For a leading modifier, ask who performs the action and place that noun immediately after the comma. For pronouns, name the intended antecedent and check whether a closer noun could claim it.
Reads the narrator's voice as the author's own position, takes an ironic or satirical statement literally, or judges a pre-modern text by present-day assumptions instead of its stated setting and conventions.
The first-person 'I' invites identification with the writer; irony leaves no marker beyond tone, and context questions reward whatever cultural frame the reader already owns.
What to do instead
Separate three layers in writing: narrator, implied author, and characters. Look for tonal signals that undercut a literal reading - hyperbole, contradiction between claim and outcome, a listener who reacts oddly. For context items, anchor the answer in the period, place and genre named in the stem or passage rather than in current usage.