Number — GCSE Revision Notes

7 notes on Number for GCSE Maths.

Factors, Multiples and Primes (HCF & LCM)A factor of a number divides into it exactly (no remainder). Factors… Fractions, Decimals and PercentagesUnderstanding how to convert between fractions, decimals and… Indices and Standard FormAn index (plural indices), or power, shows how many times a number is… Ratio and ProportionA ratio compares amounts, showing how much of one thing there is… Standard Form & Powers of 10Standard form (also called scientific notation) is used to write very… Surds & Exact CalculationsA surd is a root that cannot be simplified to a whole number or exact… Bounds & TruncationWhen a value is rounded, its lower bound is the smallest value that…

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