General Cognitive Aptitude: Speed, Classification, and Careful Inference
What the section measures
General cognitive aptitude batteries bundle several distinct skills under one clock: perceptual speed (comparing strings of letters or symbols), numerical fluency (judging magnitude and distance rather than performing long arithmetic), classification (finding which item in a set fails a shared rule), verbal reasoning (drawing a valid inference from a short passage), and non-verbal pattern work. The constructs are separate, so a weakness in one is not evidence about the others - diagnose each separately before you practise.
Concepts to hold onto
- Rule coverage. In a classification item the answer is the item the rule excludes. The rule must fit every other item exactly, including the awkward ones, not just the two that first caught your eye.
- Magnitude before calculation. Distance and comparison questions reward estimation against a benchmark. Exact subtraction is slow and rarely necessary.
- Scan discipline. String-comparison items are lost to re-reading, not to difficulty. Fix a consistent eye path and keep it.
- Inference versus restatement. Verbal options frequently state something true of the passage without answering the question asked.
Traps that recur
Transposed letters look identical at speed, and similar shapes (b/d, m/n, p/q) do most of the damage. Near-miss numeric options differ by a single unit or shift a decimal place. Classification sets often include an item that is odd in an irrelevant dimension - colour, size, font - while sharing the real rule. Extreme wording such as "always" or "never" in a verbal option is usually a prompt to recheck the passage. Finally, time sinks: when items are scored on number correct within a limit, one stuck question costs two or three later ones. Guess and move on unless wrong answers are penalised.
Worked example
Target 500; options 380 and 640. Round to the nearest hundred: 380 sits 120 below, 640 sits 140 above. So 380 is closer. Rule of thumb: compare each candidate to a round landmark first, then refine only when the two are within a few units of each other.