Mathematical Reasoning — NSW Selective Test

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Skills assessed

Problem solving

Turning a worded situation into a plan and a calculation.

Multi-step reasoning

Holding several steps together to reach a final answer.

Number sense

Fractions, decimals, percentages, ratios and proportion.

Patterns & measurement

Sequences, relationships, measurement and data.

Common question types

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Word problems

Real-world scenarios that must be translated into maths.

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Patterns & sequences

Finding the rule and extending or completing it.

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Measurement & geometry

Length, area, time, shape and spatial reasoning.

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Data & graphs

Reading tables and charts to answer questions.

Why Mathematical Reasoning matters

This section separates students who have memorised procedures from those who genuinely reason. Questions are often short on numbers but long on thinking — the challenge is choosing the right approach quickly.

Because time is tight, recognising the type of problem at a glance is as valuable as the arithmetic itself.

One example question

A single representative question, to show what this section looks like — not a practice set. The full sets live on the free practice questions page below.

A jug holds 1.5 litres. If 3 glasses each hold 250 mL are poured from a full jug, how much is left?

  • 250 mL
  • 500 mL
  • 750 mL ✓
  • 1 litre

Answer & explanation

750 mL. 3 × 250 mL = 750 mL poured. 1.5 L = 1500 mL, so 1500 − 750 = 750 mL remains. The trick is converting litres and millilitres before subtracting.

Want more? Try a set of free practice questions across all four subjects.

How to prepare at home

What helps between now and the test. Technique for the test itself — pacing, elimination, checking your reasoning — is a separate job, and has its own guide.

  • ✓Sharpen mental maths and times tables until arithmetic is automatic.
  • ✓Ask for the working, not just the answer — that is where reasoning shows.
  • ✓Talk through everyday maths: change, timings, distances, doubling a recipe.

For technique in the test itself, read how to improve at Mathematical Reasoning.

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