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EPSO Abstract Reasoning — every format explained with strategy

Abstract Reasoning is consistently the module that eliminates the most otherwise-qualified candidates. It has the steepest learning curve and the tightest time pressure — 30 seconds per question. The good news: it is highly trainable. This guide explains all seven EPSO abstract formats and the systematic scanning approach that makes each one tractable.

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2025-01-15

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Why Abstract Reasoning is different from other EPSO modules

Verbal, EU Knowledge, and Digital Competency can be prepared through study and retrieval practice. Abstract Reasoning cannot — there is no factual content to memorise. You are tested on your ability to identify visual patterns under extreme time pressure.

The key insight is that "visual pattern recognition" sounds like an innate talent but is actually a learnable process. Candidates who perform consistently well have internalised a systematic scanning sequence — they check specific visual properties in a fixed order rather than staring at figures hoping something jumps out.

The universal scanning sequence

For every Abstract Reasoning question, scan for these properties in this order:

1. Shape — what type of shape is present? Does it change across frames/cells? 2. Fill — is the shape empty, filled, half-filled, or dotted? Does it alternate or progress? 3. Size — is the shape small, medium, or large? Is there a size progression? 4. Rotation — is the shape rotating by a fixed angle between frames? 5. Count — how many elements are there? Is the count increasing or decreasing? 6. Position — where is the shape within the frame? Does it move in a pattern?

Checking these properties in sequence — rather than trying to "see" the pattern holistically — converts abstract reasoning from an intuitive guessing game into a systematic process. Most EPSO questions use two or three of these properties simultaneously.

The most commonly missed properties are rotation and count. Candidates naturally check shape and fill first. EPSO question writers know this — they frequently place the pattern in the properties you scan last.

Format 1 — Series completion (what comes next?)

A sequence of 4–6 frames is shown. You must identify which of four answer options correctly continues the sequence.

Strategy: Identify which property changes between consecutive frames (not all at once). Most series questions change one or two properties per step. If the shape stays constant but the fill alternates, focus on fill progression. If both shape and rotation change, determine the rate of change for each independently.

  • Check whether the change between frames is constant (same increment each step) or alternating (A→B→A→B)
  • If you cannot identify the pattern in 15 seconds, eliminate the two options that clearly break the most rules
  • Common trap: the correct answer matches the series on 2 of 3 properties — check all three before selecting

Format 2 — Odd one out (which one does not belong?)

Five items are shown. Four share a common rule; one breaks it. You must identify which one.

Strategy: Identify what rule 4 of the 5 items follow. Do not look for what is "different" visually — look for what rule is shared by the majority. Common shared rules include: same number of sides, same fill pattern, same rotation axis, or all shapes belonging to the same class (polygons, curves, etc.).

  • Check shape type first: are 4 of the 5 all polygons? All with an even number of sides?
  • Check fill: do 4 of the 5 follow the same fill pattern?
  • Be suspicious of the most visually striking item — it is often a distractor

Format 3 — Matrix completion (3×3 grid with missing cell)

A 3×3 or 2×3 grid is shown with one cell missing. Each row and column follows consistent rules. You must identify the missing cell.

Strategy: Analyse rows first, then columns. For each row, determine: does the shape change? Does the fill change? Does the size change? Then confirm the column rules are consistent. The answer must satisfy both row and column rules simultaneously.

  • In AD5 matrices, the missing cell is almost always in the bottom-right — you need to satisfy both the third row and third column rule
  • Use elimination: if you identify the shape and fill but are unsure about size, eliminate options with the wrong shape first
  • Watch for the "each row/column contains all three variants" rule — very common for fill (empty/half/filled) and size (S/M/L)

Format 4 — Analogy (A is to B as C is to ?)

A pair of shapes (A and B) demonstrates a transformation rule. You must apply the same rule to C to find the answer.

Strategy: Identify exactly what changed from A to B. List the changes: did the fill invert? Did the shape rotate 90°? Did a smaller shape appear inside? Then apply each change to C in sequence. The correct answer is the one produced by applying all the same transformations.

  • List every change from A to B before looking at options — do not let the options guide your analysis
  • Common transformations: 90°/180° rotation, fill inversion (filled↔empty), size change (large↔small), shape replacement
  • Compound transformations (two changes at once) are common in harder questions

Format 5 — Classification (which option fits the group?)

A group of 3–5 items is shown that all share a hidden rule. One of four answer options also belongs to the group; the others do not.

Strategy: Determine the rule shared by all given items before looking at the options. The rule is often more abstract than it first appears — e.g., "all shapes have exactly one axis of symmetry" or "the number of sides is always a prime number."

Format 6 — Transformation (apply the rule to a new shape)

Similar to analogy, but the transformation is shown separately as a "rule card" and you apply it to a target shape. The rule might be: "reflect horizontally and invert the fill." You must apply it to produce the correct result.

Format 7 — Nested shapes series

A sequence of frames each containing shapes nested inside each other (outer shape, middle shape, inner shape). Properties of each layer change between frames. You must identify the next frame.

Strategy: Analyse each layer independently. The outer shape may follow one rule (rotating 90° each frame) while the inner shape follows a different rule (fill cycling: empty → half → filled). Do not conflate the layers.

Timed practice: 30 seconds per question

The EPSO Abstract Reasoning section allows 30 seconds per question — the tightest time pressure in the entire CBT. This means your scanning sequence must become automatic.

Practice the sequence until it requires no conscious effort: shape → fill → size → rotation → count → position. In early practice sessions, work untimed and focus on executing the sequence correctly. In weeks 2–3, introduce a 45-second limit. By week 6, work to the real 30-second limit.

Candidates who practice untimed throughout almost always run out of time in the real exam. The time pressure in Abstract Reasoning is not incidental — it is a core part of what the test measures. Timed practice is non-negotiable.

Frequently asked questions

How many questions are in the EPSO Abstract Reasoning test?

20 questions in 10 minutes for the AD5 competition — approximately 30 seconds per question. Abstract Reasoning is averaged with Numerical Reasoning to form the CBT Gate 1 score. Both must be passed.

Can Abstract Reasoning be learned from scratch?

Yes. It is the most trainable of all EPSO modules because it is a skill — not knowledge. Candidates who had very low initial scores and practiced systematically (learning the scanning sequence and doing 200+ timed practice questions) routinely achieve scores above the competitive threshold.

Which Abstract Reasoning format is hardest?

Nested shapes series and matrix completion with compound rules are typically rated hardest. Series completion is the most common format and becomes tractable with practice. Odd-one-out is often the fastest to solve once you identify the shared rule.

Are there different visual styles in real EPSO questions?

Yes. EPSO uses both simple geometric shapes (circles, triangles, squares) and more complex figures (arrows, crosses, irregular polygons). The scanning sequence works for all visual styles because it targets properties rather than specific shapes.

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