4MA1/2HR Jun 2025, Question 12: Compound Interest
Pearson Edexcel International GCSE Mathematics A 4MA1 · Paper 2HR (Higher) · Calculator · 3 marks
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The question, in short
Car costs $16 000, loses 12% yearly for 2 years, then x% in year 3, ending at $11 461.12; find x.
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Solution · 3 marks
- 1After 2 years: 16 000 × 0.88² = 16 000 × 0.7744 = 12 390.40
- 2Third-year multiplier: 11 461.12 ÷ 12 390.40 = 0.925
- 3Decrease: 1 − 0.925 = 0.075
- 4x = 7.5
Answer7.5
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