0580/33 Oct/Nov 2025, Question 18: Using a Calculator
Cambridge IGCSE Mathematics 0580 · Paper 33 (Core) · Calculator · 2 marks
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The question, in short
Calculate two numerical values: a square root of a combined expression, and a negative power.
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Part (a) · 1 mark
Evaluate √((8.4² + 9.3) ÷ 26.5).
- 18.4² + 9.3 = 70.56 + 9.3 = 79.86
- 279.86 ÷ 26.5 = 3.0135…
- 3√3.0135… = 1.7359… ≈ 1.74
Answer1.74 or 1.735 to 1.736
Part (b) · 1 mark
Evaluate 4⁻³.
- 14⁻³ = 1/4³ = 1/64 = 0.015625
Answer0.015625 or 1/64
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