Financial mathematics

Paper labels are an unofficial, independently authored grouping, applied only where a question's own format genuinely matches a real paper convention (such as IB Mathematics AA's non-calculator/calculator split). They do not reproduce any exam board's real paper numbering or mark allocation, and uncertain questions are labelled general practice instead.

• 3A delivery van bought for AED 90,000 depreciates at 15% per year using the reducing-balance method. Find its value after 4 complete years, and state the first complete year in which its value falls below AED 40,000.Paper 1 styleMedium4 marksCalculator+
• 4Marking analysis: A learner attempts the following task: “A delivery van bought for AED 90,000 depreciates at 15% per year using the reducing-balance method. Find its value after 4 complete years, and state the first complete year in which its value falls below AED 40,000.” Their response addresses only this point: “Uses the reducing-balance model V = 90000(0.85)^n.” Evaluate the response against the complete 4-mark task. Identify what earns credit and state every additional requirement needed for full marks.Marking analysisMedium4 marksNo calculator+