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Ratio & ProportionDeep Dive

Method: DMV Triangle

Part of Density — GCSE Mathematics

This deep dive covers Method: DMV Triangle within Density for GCSE Mathematics. Revise Density in Ratio & Proportion for GCSE Mathematics with 14 exam-style questions and 3 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 3 of 5 in this topic. Use this deep dive to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 3 of 5

Practice

14 questions

Recall

3 flashcards

Method: DMV Triangle

1 Identify what you have (M, D, or V) and what you need
2 Use triangle: Cover what you need - what's left is the formula
3 Check your units match (convert if needed)
4 Calculate and include units in your answer

Keep building this topic

Read this section alongside the surrounding pages in Density. That gives you the full topic sequence instead of a single isolated revision point.

Key FactsWorked Example 1: Finding DensityWhat Is Density?Worked Example 2: Finding Mass

Practice Questions for Density

Which formula correctly shows how density (D), mass (M) and volume (V) are related?

  • A. D = M + V
  • B. D = M × V
  • C. D = M ÷ V
  • D. D = V ÷ M
1 markfoundation

Explain what is meant by a density of 5 g/cm³.

2 marksstandard

Quick Recall Flashcards

Floating Rule
Objects float if their density is LESS than the liquid. Water = 1 g/cm³, so anything under 1 g/cm³ floats.
Density Formula
Density = Mass ÷ Volume. Units: g/cm³ or kg/m³. Cover what you need in the triangle!

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Worked Example 1: Finding Density