"Cannot Say" and trick options across all test types
Trick options are not random. They are engineered from the most common mistakes candidates make. If you know how they are built, you can spot them before they catch you. For verbal-specific evidence rules, read Cannot Say in verbal reasoning; for numerical distractors, use percentage shortcuts and data interpretation.
- Wrong options are usually built from common mistakes, not random numbers or statements.
- Verbal traps exploit unsupported inference and qualifier shifts.
- Numerical traps often use the wrong base, wrong unit or uncompounded percentage.
- Logical traps satisfy one rule while breaking another.
The fastest way to beat trick options is to review why each wrong option was tempting. Start verbal practice
What to focus on first
| Focus area | Why it matters | Best drill |
|---|---|---|
| Verbal | Cannot Say and qualifier changes create attractive near-misses. | Underline the exact evidence. |
| Numerical | Distractors are often real calculations with one wrong assumption. | Name the denominator and unit before calculating. |
| Logical | One-rule distractors catch partial solvers. | List every rule before choosing. |
| Review | Knowing why the wrong option tempted you prevents repeats. | Write the trap type after each miss. |
Common traps
- Choosing the familiar wording. Shared words do not mean shared meaning.
- Trusting precise numbers. A precise distractor can be precisely wrong.
- Stopping after one rule fits. Hard logical items usually need all rules checked.
How to practise from here
After each practice set, pick three wrong options and reverse-engineer them. Ask what mistake produced that option. That is the mistake the test is trying to make you repeat.
Verbal: the “Cannot Say” discipline
“Cannot Say” is the hardest option because it requires you to resist drawing conclusions. Your brain wants to infer — that is how conversation works. But verbal reasoning tests are not conversation. They are evidence tests.
Cannot Say. The passage only tells us about the Northern region. Other regions might have grown more. “Highest” requires comparison data that is not provided.
Numerical: the near-miss distractor
Numerical trick options are calculated using the mistakes you are most likely to make:
- Dividing by the wrong base — (new − old) / new instead of / old.
- Forgetting to convert units — answer in thousands when the question asks for millions.
- Adding percentages instead of compounding — 10% + 10% = 20% (wrong) vs 1.1 × 1.1 = 21% (right).
Correct: (B) 20% = (60−50)/50. Distractor (A): 10/60 = 16.7% — dividing by the new value. Distractor (D): 50/60 = 83.3% — computing the ratio the wrong way. Distractor (C): 10% — just the raw difference divided by 100.
Logical: the pattern red herring
In abstract reasoning, wrong options often follow one of the rules in the sequence but break another. If the pattern involves both rotation and shading change, a distractor might have the correct rotation but wrong shading.
Candidates who spotted the shape-change rule but missed the rotation rule will pick this distractor. Each wrong option is designed to catch candidates who identified some but not all rules.
How to defend yourself
- After computing your answer, check if it matches a “common mistake” option. If your answer is suspiciously close to a distractor, re-verify.
- In verbal, default to Cannot Say when unsure. Over-inferring is the most common error. When in doubt, stick with what the passage explicitly says.
- In logical, verify all rules against your answer. Write them down if needed: “Rule 1: rotate 90° CW. Rule 2: add one element. Rule 3: shading alternates.”
Your review should include the wrong options, not only the correct answer. If a distractor was tempting, label why: outside knowledge, wrong base, wrong unit, partial rule or over-strong wording. That label tells you what to drill next in wrong-answer review.
Source notes
forge checks verbal trap guidance against SHL’s verbal reasoning examples and numerical distractor patterns against SHL’s numerical reasoning examples.
Practise ambiguity questions on forge
Verbal reasoning packs with detailed explanations for every Cannot Say and False answer — so you learn to distinguish them.
Start practisingFrequently asked questions
Why do aptitude tests include trick options?+
Wrong options are usually built from common mistakes such as unsupported inference, wrong bases, wrong units or partial pattern rules.
How do I avoid verbal trick options?+
Point to the exact evidence sentence. If the statement adds a claim that the passage does not prove, choose Cannot Say.
How do I avoid numerical distractors?+
Name the denominator, unit and time period before calculating. Many distractors are real calculations based on one wrong assumption.
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