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CoreX • Core Maths

Numbers Subtopics

Choose a Core subtopic and practise focused exam-style questions.
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Types of Numbers

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Natural numbers, integers, primes, squares, cubes, rational and irrational numbers.
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Sets

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Set notation, elements, subsets, complements and simple Venn diagrams.
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Powers & Roots

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Squares, cubes and their roots in mental and written calculations.
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Fractions, Decimals & Percentages

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Converting between forms and solving calculations in real-life contexts.
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Ordering

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Ordering integers, decimals, fractions and percentages using symbols.
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The Four Operations

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Addition, subtraction, multiplication, division and BIDMAS.
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Standard Form

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Writing large and small numbers using standard form.
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Rounding & Estimation

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Rounding to dp and sig figures; estimating sensible answers.
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Limits of Accuracy

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Upper and lower bounds for measurements rounded to given units.
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Ratio & Proportion

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Simplifying ratios and solving proportional word problems.
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Rates

Practice questions
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Everyday rates such as speed, pay and currency exchange.
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Percentages

Practice questions
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Finding percentages of amounts and simple percentage problems.
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Using Calculator

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Efficient calculator use and correct rounding of final answers.
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Time

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12h/24h time, timetables and calculating time differences.
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Money

Practice questions
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Everyday money problems, bills and currency conversion.
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