Top 10 OC & Selective Thinking Skills Patterns Every Student Must Know

Thinking Skills is the subject that catches most families off guard. Unlike Maths or Reading, it is not explicitly taught in the school curriculum — yet it accounts for a full third of the OC test and a quarter of the Selective exam. The good news: every Thinking Skills question falls into one of a small number of recurring patterns. Learn the patterns, and your child will know what to do the moment they see a new question.

Below are the 10 most common Thinking Skills pattern types tested across both OC and Selective. For each, we explain what it is, give you an idea of how it appears on the test, and share practical tips for practice.

1. Number Sequences

The student is given a series of numbers and must identify the rule to find the next term — or a missing term in the middle. At the OC level, most sequences use a constant difference (e.g. +3, +3, +3) or a constant ratio (e.g. ×2, ×2). Selective-level sequences add layers: alternating operations (+2, ×3, +2, ×3), two interleaved sequences, or differences that themselves form a pattern.

Example concept: "What comes next: 4, 7, 12, 19, 28, ?" — the differences are 3, 5, 7, 9, so the next difference is 11, giving 39.

Tip: Always write out the differences between consecutive terms. If those differences are not constant, write the differences of the differences. Most sequences resolve within two levels.

2. Figure and Shape Sequences

Instead of numbers, the student sees a row of shapes or figures that change according to a rule. Common transformations include rotation (turning 90° each step), reflection (flipping horizontally or vertically), growth (adding one element each step), or shading changes (alternating black and white segments).

Example concept: A triangle rotates 45° clockwise each step while a small circle alternates between inside and outside the triangle.

Tip: Isolate each visual element and track its change independently. A complex figure sequence is usually two or three simple rules happening at the same time.

3. Verbal Analogies

"A is to B as C is to ?" — the student must identify the relationship between the first pair and apply the same relationship to the second pair. Relationships include synonyms, antonyms, part-to-whole, category membership, degree (warm → hot), and function (pen → write).

Example concept: "Calf is to cow as kitten is to ?" (young animal to adult animal).

Tip: Form the relationship as a sentence: "A calf is a young cow." Then substitute: "A kitten is a young ___." This forces your child to articulate the rule before scanning the options.

4. Visual Analogies

The visual version of analogies: the student sees a shape transformed (rotated, resized, inverted, with added or removed elements) and must apply the same transformation to a new shape. These are common in both OC and Selective and test spatial awareness without requiring language.

Example concept: A square gains a diagonal line and turns grey → apply the same changes to a circle.

Tip: List every change between the first pair: size, colour, orientation, added elements. Then check that every change applies to the answer. Missing even one detail leads to the wrong option.

5. Paper Folding

A flat piece of paper is shown being folded one or more times, then a hole is punched through the folded paper. The student must determine what the paper looks like when unfolded. This is a pure spatial reasoning task and one of the most challenging patterns for students who have not practised it.

Example concept: A square sheet is folded in half vertically, then a hole is punched near the fold. When unfolded, two holes appear symmetrically placed about the fold line.

Tip: Practise with real paper. Fold a sheet, punch a hole with a pencil, and unfold it. After 10 physical attempts, students develop strong intuition. Then move to paper-based practice.

6. 3D Cube Views and Net Folding

Two variations: (a) given a flat net, which cube does it make? or (b) given a cube with symbols on visible faces, which arrangement is impossible? These questions test the ability to mentally manipulate 3D objects. Selective tests often combine this with rotation — "if you rotate the cube 90° to the right, what do you see?"

Example concept: A cross-shaped net has different symbols on each square. Which of four cubes could be folded from this net?

Tip: Learn the "adjacent face rule" — on a standard cross net, opposite faces never share an edge. Teach your child to mark which faces are opposite; they can never be visible at the same time on a cube.

7. Logical Deduction

These questions present a set of conditional statements ("If it rains, Anna takes the bus. Anna did not take the bus. Therefore...") and ask the student to draw a valid conclusion. More complex versions involve seating arrangements, ordering problems, or scheduling puzzles where multiple constraints must be satisfied simultaneously.

Example concept: Four children sit in a row. Ben is not next to Amy. Carla is between Dan and Amy. Who sits at the far left?

Tip: Use a grid or diagram. For seating problems, draw the seats and try placing people one constraint at a time. Systematic elimination beats guessing every time.

8. Matrices (3×3 Grids)

A 3×3 grid of shapes where rows and columns each follow a rule. One cell — usually the bottom-right — is empty, and the student must select the missing piece. Rules can involve shape type, size, shading, orientation, or the number of elements. The difficulty comes from having to satisfy both the row rule and the column rule simultaneously.

Example concept: Each row contains a circle, a square, and a triangle. Each row uses three different shadings (empty, striped, solid). The missing cell must complete both patterns.

Tip: Check the row first to narrow options, then verify against the column. If your child practises reading both directions consistently, these become quick marks.

9. Code and Cipher Patterns

The student is given a coding rule — for example, A = 1, B = 2 — or must figure out the rule from examples. Variations include letter shifts (each letter moves forward by 3), symbol substitution, or two-step encodings. These test pattern recognition and the ability to reverse-engineer a rule from data.

Example concept: If CAT = 24, DOG = 26, what is PIG? (Rule: sum of letter positions, C+A+T = 3+1+20 = 24.)

Tip: Have your child memorise letter positions (A=1 through Z=26) until they are automatic. Much of the difficulty in cipher questions comes from slow letter-to-number conversion, not from the logic itself.

10. Data Extraction from Tables and Charts

The student is shown a table, bar chart, pie chart, or timetable and must answer questions that require reading values, comparing data, or performing simple calculations. These questions are technically easy but are designed to be time traps — students who read carelessly will misread a row or column.

Example concept: A timetable shows bus departure times from four stops. "If Mia arrives at Stop B at 8:47 am, how long must she wait for the next bus?"

Tip: Teach your child to underline the specific row and column before answering. Careless misreads are the number one cause of errors on data questions — not lack of ability.

OC vs Selective: How Difficulty Differs

Both tests cover the same 10 pattern types, but Selective Thinking Skills is harder in three ways:

• More layers per question: An OC sequence might have one rule; a Selective sequence might combine two or three.
• More distractors: Selective options are designed to catch students who identify only part of the rule.
• Tighter time pressure: Selective students get roughly the same time per question but questions require more steps.

The implication for preparation is clear: students aiming for Selective should first master every pattern at OC level, then increase complexity. Skipping the fundamentals leads to inconsistent performance.

How to Build Thinking Skills Systematically

Because Thinking Skills is not taught in school, parents must build it from scratch. The most effective approach is pattern-based training: identify which of the 10 patterns your child is weakest on, and drill those specifically. Random practice papers are inefficient because they spread time equally across patterns your child has already mastered and ones they have not.

Start early — ideally 6 to 12 months before the test. Spend 15 minutes daily on one pattern type at a time. Once your child can solve a pattern consistently (three sessions in a row without errors), move to the next. This targeted approach is far more effective than working through generic workbooks cover to cover.