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Growth & Decay

Revise Growth & Decay in Number for GCSE Mathematics with 12 exam-style questions and 22 flashcards. This topic appears regularly enough that it should be part of a solid GCSE revision cycle.

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1

The Pandemic That Taught Us Exponentials

Introduction2

Essential Growth & Decay Formulas

Key Facts3

Growth vs Decay Curves

Diagram4

The 5-Step Growth & Decay Method

Deep Dive5

Worked Examples

Notes6

Exam Success Strategies

Exam Tips7

Knowledge Organiser: Exponential Growth and Decay

Summary8

Common Mistakes to Avoid

Diagram9

Real-World Applications

Diagram

Sample Flashcards

What is the formula for half-life decay?
N = N₀ × (0.5)ⁿ Where: N = remaining amount N₀ = initial amount n = number of half-life periods
What is the formula for exponential decay?
N = N₀ × (1 - r)ⁿ Where: N = final amount N₀ = initial amount r = decay rate (as decimal) n = number of time periods

Exam questions for Growth & Decay

A quantity increases by 8% each year. Which multiplier should be used for each year?

  • A. 0.08
  • B. 0.92
  • C. 1.08
  • D. 1.8
1 markfoundation

Explain the difference between simple interest and compound interest.

2 marksstandard

Want more? See all GCSE Mathematics exam questions by paper with full model answers and mark schemes.

12

exam-style questions

22

revision flashcards

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