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What bounds mean

What bounds mean

Number line with 20.5 as a filled endpoint and 21.5 as an open endpoint for 21 cm to the nearest cm

A rounded measurement is not exact. If a length is given as 21 cm to the nearest cm, the true value lies in a continuous interval of possible values.

Bounds Lesson

  1. IGCSE
  2. /Maths
  3. /Bounds

Step-by-step lessons covering CIE IGCSE Maths Bounds for Core and Extended tier. Each lesson works through exam-style questions in Paper 1 and Paper 3 (Core) or Paper 2 and Paper 4 (Extended) format. Start with the Core-tier fundamentals in number and algebra before moving on to the more demanding Extended-only topics like calculus-adjacent algebra and advanced trigonometry.

Lessons

SurdsBoundsDirect and Inverse ProportionQuadratic FormulaFactorising Harder QuadraticsAlgebraic FractionsRearranging Harder FormulaeFinding the Area of Any TriangleThe Sine RuleThe Cosine Rule3d Pythagoras and TrigonometryThe Magnitude of a VectorHistogramsConditional Probability