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Cambridge IGCSE Mathematics practice

MCQ practice - Understand and express both direct and inverse proportion using algebraic forms, including linear, square, square root, cube, and cube terms, to determine unknown quantities. Familiarity with the proportional symbol (∝) is necessary. - Proportion

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At a glance

MCQ

Type

cambridge_mcq

Style

Topic

Proportion

Exam-style question

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If y is directly proportional to the square of x and y = 18 when x = 3, what is y when x = 6?.

  1. A.72
  2. B.36
  3. C.54
  4. D.24

Answer and explanation

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Maths method check

  • Topic focus: Proportion.
  • Question style: cambridge_mcq.
  • Reasoning demand: reasoning.
  • Check the operation, notation, units, and final answer form against the question before moving on.

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Paper 2 structured question: Proportion

Paper 2Core or Extended Mathematics3 marks

Description

Direct Proportion Example

A quantity y is directly proportional to the square of x. When x = 4, y = 32.

  1. a

    Calculate the constant of proportionality k in the equation y = kx^2.

    Aim for approximately 3 distinct marking points.

    [3]