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Revision Notes
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GCSE Maths
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Number
Number — GCSE Revision Notes
4 notes on Number for GCSE Maths.
Factors, Multiples and Primes (HCF & LCM)
Key definitions Factor – divides exactly into a number. Factors of…
Fractions, Decimals and Percentages
Conversions to memorise Fraction Decimal % 1/2 0.5 50% 1/4 0.25 25%…
Indices and Standard Form
Laws of indices aᵐ × aⁿ = aᵐ⁺ⁿ (multiply → add powers) aᵐ ÷ aⁿ = aᵐ⁻ⁿ…
Ratio and Proportion
Simplifying ratios Divide all parts by the HCF: 12 : 18 = 2 : 3 . To…
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