Interviews · 5 min read
Aptitude and reasoning tests: how to prepare
Aptitude or cognitive ability tests measure reasoning: working with numbers, text, logic or abstract patterns under time pressure. They are common in graduate recruitment, high-volume hiring and some professional roles.
The important practical fact, and the difference from personality questionnaires: **practice works.** Not because your underlying reasoning changes in a week, but because a large part of what these tests measure in practice is familiarity with the format, and familiarity is exactly what practice provides.
This is also why employers who use them well provide practice materials, since otherwise they are partly measuring who has taken twenty of these before.
The common types
Numerical reasoning. Interpreting data in tables and charts and doing calculations. The arithmetic itself is not advanced. The difficulty is finding the right numbers quickly and handling percentages, ratios and percentage change under time pressure.
Verbal reasoning. Reading a passage and judging whether statements are true, false or cannot be determined from it. The trap is bringing in outside knowledge. The question is only ever what the passage supports.
Logical, inductive or abstract reasoning. Identifying the pattern in a sequence of shapes. No knowledge required, which is why these are used across very different roles.
Situational judgement. Workplace scenarios with several possible responses. Less about reasoning and more about judgement against what the employer considers good practice.
Mechanical, spatial or error-checking. Role-specific, common in technical, engineering and some operational roles.
Practise properly
Do timed practice. Untimed practice is close to useless, because the entire difficulty is time pressure. Most of these are designed so almost nobody finishes.
Do enough to be fluent, not exhausted. A few hours across several sessions is the right order of magnitude. Diminishing returns arrive quickly.
Use practice material from the same publisher where the employer has told you which test it is. Formats differ and familiarity with the specific format is most of the benefit. Employers frequently provide links, so use them.
Review the ones you got wrong, and work out whether it was the method, the arithmetic or the time. Those are three different problems with three different fixes.
For numerical tests, get comfortable with percentage change, ratios, unit conversions and reading a chart quickly. For verbal, practise the discipline of answering only from the passage. For abstract, get used to checking the common pattern types systematically rather than staring.
On the day
Set up properly. Quiet, uninterrupted, charged, stable connection, and a calculator and paper if permitted. Check in advance whether a calculator is allowed, because tests are designed around the answer.
Read the instructions. The scoring sometimes differs: some tests penalise wrong answers, most do not. That changes whether guessing is sensible.
Move on. The most common mistake is spending too long on a hard question early. If it is not coming within a reasonable time, flag it and move.
Guess if there is no penalty. An unanswered question scores zero. A guess has a real chance.
Do not expect to finish. Many of these are deliberately longer than the time allows, and everyone is in the same position.
Do a practice round first if the platform offers one. Always.
Ask for adjustments if you need them
Timed tests disadvantage candidates with dyslexia, ADHD, visual impairments and various other conditions in ways that have nothing to do with job performance.
Extra time and alternative formats are standard adjustments. Ask the recruiter before the test. You do not need to give detail, and the request should be handled privately. Employers should offer this and many now do so proactively.
Keeping it in perspective
These tests measure one thing, and employers who use them well use them as one input among several, with a threshold rather than a ranking.
If you do badly on one, it is worth remembering how much it is actually being asked to predict. A single reasoning test is a thin basis for a hiring decision, and an employer treating it as the whole decision is telling you something about their process.
Common questions
Can you prepare for an aptitude test?
Yes, and practice genuinely helps, mostly by removing surprise about the format. A few hours of timed practice is the right amount.
How long should I practise?
A few hours across several sessions. Returns drop off quickly beyond that.
Should I guess if I do not know?
If there is no penalty for wrong answers, yes. Check the instructions, because a minority of tests do penalise.
What if I run out of time?
Most of these are designed so that almost nobody finishes. Answer as many as you can accurately and do not treat it as a failure.
Can I get extra time for a disability?
Yes. Ask the recruiter in advance. Extra time and alternative formats are standard adjustments and you do not need to explain in detail.
The short version
Practice works for these, unlike personality tests. Do a few hours of timed practice in the specific format, use any material the employer provides, move on quickly from hard questions, guess where there is no penalty, and ask for adjustments in advance if you need them.