Preparing for Aptitude Tests in Job Applications: Test Types, Practice and Test-Day Tips

Understand the numerical, verbal, logical and personality tests employers use to screen candidates, plus a two-week practice plan and test-day tips.

You apply to a company you really want to join, and the reply says "Please complete the online assessment within 3 days." You open the link and see tables of numbers, charts and a countdown timer. Many candidates are screened out at this step, not because they lack ability, but because they have never seen the format and run out of time. This article walks you through each test type and a plan to get ready before you press start.

What is an aptitude test, and why do companies use it?

An aptitude test measures how well you think, interpret information and solve problems under time pressure. Companies with large applicant pools, such as Management Trainee or Graduate Programs, often use it as a screen before interviews because it lets HR compare candidates on the same yardstick quickly. Results are usually compared against other test takers rather than scored out of 100, so your goal is to perform well enough to pass the threshold, not to get every question right.

The four test types you will meet most often

1. Numerical reasoning

You get a table, chart or short report and questions that require calculation, such as growth rates, percentage shares, averages or currency conversion. A calculator is usually allowed. The hard part is finding the right data in the table quickly and ignoring the data included to distract you.

2. Verbal reasoning

You read a short passage, often in English, and decide whether a statement is True, False or Cannot Say. The classic trap is answering from general knowledge when you must answer from the passage only. If the passage does not say it, the answer is Cannot Say.

3. Logical or inductive reasoning

You look at a series of shapes or symbols and find the hidden rule, for example a shape rotating 90 degrees each time, dots increasing by one, or colours alternating, then pick the next item. Practice pays off here because the rules repeat a limited set of patterns.

4. Personality or situational judgement tests

There are no right answers in the way a maths question has one, but the company looks at how well you fit the role and culture and whether you answer consistently, since similar questions are often asked again in different forms. Read more in Personality tests in job applications.

Mistakes that get people screened out

• Getting stuck on a hard question: most tests give you less than a minute per question. Two minutes on one item can cost you the last three.
• Ignoring units: thousands or millions, percent or percentage points. One misread and the whole answer is wrong.
• Testing somewhere noisy: online tests usually cannot be paused. A dropped connection or an interruption costs you immediately.
• Faking the personality test: choosing "strongly agree" for everything that sounds good can be flagged as inconsistent.

Example: a typical numerical question

Suppose a table says Company A had sales of 120 million baht in year 1 and 150 million baht in year 2. The question asks for the growth rate. You calculate (150 minus 120) divided by 120, which is 0.25 or 25%. Percentage change, ratios and averages cover most numerical questions. Once you are fluent with these three, you will be much faster.

An aptitude test does not measure how smart you are. It measures how familiar you are with the format and how well you manage time.

Where to start: a two-week practice plan

1. Days 1 to 2: take one free practice test of each type under real timing to find your weakest area.
2. Days 3 to 6: practise your weakest area for 30 minutes a day. Review percentages, ratios and chart reading.
3. Days 7 to 9: read a short English article every day and summarise it in one sentence. For more on building English skills, see the TOEIC and IELTS guide.
4. Days 10 to 12: take a full practice set again, with slightly tighter timing than the real test, and practise skipping hard questions immediately.
5. Days 13 to 14: rest well, prepare your computer, internet connection, calculator and scrap paper, and choose a time with no interruptions.

Test-day tips

• Read the instructions fully before you start. Some tests deduct marks for wrong answers and some do not, which affects whether you should guess.
• Keep a time-per-question budget in your head. If you exceed it, make a reasoned guess and move on.
• Take the test when your mind is freshest. You do not have to start the moment the email arrives, as long as you stay within the deadline.

Once you pass the test, the interview comes next. Read Pre-interview assessment tests, practise real questions in Interview Lab, and when you are ready, find the right role on the Plants.work job listings.