How to Pass the EPSO Numerical Reasoning Test (AD5 Guide)

The numerical reasoning test is the shortest of the three EPSO CBTs but often the most stressful — 10 questions in 20 minutes, each requiring you to extract data from a table or chart and perform a calculation. The maths itself is straightforward; the challenge is working quickly and accurately under pressure.

The Format

• 10 questions in 20 minutes
• Each question is based on a data table or chart
• One or more questions may share the same table
• An on-screen calculator is available at all times
• Five answer options (A–E) for each question

The data typically comes in the form of a table with rows and columns of numbers, a bar chart, a line graph, or a pie chart. Questions test your ability to read the data correctly and apply a calculation.

What Maths Do You Need?

The mathematical operations tested are basic:

• Addition, subtraction, multiplication, division
• Percentages and percentage change
• Ratios and proportions
• Simple averages
• Reading values from graphs

You do not need advanced maths. What you need is speed and accuracy with basic operations, and the ability to read data tables without misreading rows and columns.

How to Use the On-Screen Calculator

The TAO platform provides a basic on-screen calculator. Using it efficiently is a skill in itself:

• Use it for every multi-step calculation — do not try to do arithmetic mentally under pressure
• Write down intermediate results in the scratchpad to avoid losing track
• Double-check which row and column you are reading before entering numbers — misreading the table is the most common source of errors

The scratchpad (notepad tool) in the TAO interface is invaluable — use it to note down the numbers you are working with before calculating.

The Most Common Mistakes

Mistake 1 — Reading the wrong cell: Data tables in EPSO questions often have multiple rows and columns with similar-looking labels. Always confirm you are reading the correct intersection.

Mistake 2 — Using the wrong year or category: Questions often ask about a specific year, region, or category. Re-read the question after finding your data to confirm you used the right values.

Mistake 3 — Percentage vs percentage point: "Increased by 5%" is not the same as "increased by 5 percentage points". This distinction appears regularly in EPSO questions.

Mistake 4 — Wrong direction for percentage change: The formula is: (New − Old) / Old × 100. Using Old − New gives you the wrong sign.

Mistake 5 — Not reading the units: Tables often express values in thousands or millions. Forgetting a unit multiplier leads to a wildly wrong answer — though the correct multiple is usually among the answer choices to catch this mistake.

Time Management

20 minutes for 10 questions = 2 minutes per question. This is tighter than it looks once you account for reading the table and performing calculations.

Tips:

• Skim the table first before reading the question — understand its structure (what are the rows, what are the columns, what are the units).
• Eliminate clearly wrong answers quickly. In many cases two or three options are obviously too large or too small.
• Do not get stuck. If a question is taking more than 2.5 minutes, mark your best guess and move on. Come back if time allows.

Percentage Change — The Most Tested Calculation

The percentage change formula appears in almost every EPSO numerical test:

Percentage change = (New Value − Old Value) / Old Value × 100

Practice this until it is automatic. Also practice:

• What percentage is X of Y: X / Y × 100
• Finding the original value given a percentage change: New Value / (1 + rate)
• Compound vs simple questions — EPSO usually only uses simple percentage calculations

Practice Strategy

1. Master the formula sheet first — percentage change, ratio, average. Know them cold.
2. Practice reading data tables — find publicly available Eurostat tables and practice extracting specific values quickly.
3. Time yourself from the start — numerical reasoning speed comes from repetition.
4. Review every wrong answer — identify whether you made a maths error, a data reading error, or a formula error. Each requires a different fix.

What Score Do You Need?

The pass threshold is approximately 50% — so 5 out of 10 correct. But to be competitive enough to rank among the top 1,490, you should aim for 7–8 out of 10. In a competitive cycle, the top candidates are scoring 80–90%.

The good news: numerical reasoning is the most improvable of the three tests. With structured practice, most candidates can raise their score significantly in a few weeks.