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Capstone · Grades 7–9 Keystones #226 14 August 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 14 August 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — powers of powers

    Simplify: ((a3)3)3

    Answer: a27
  2. 2. Algebra Quadratic nth term

    Determine the nth term: 6, 18, 38, 66, ...

    Answer: 4n² + 2
  3. 3. Geometry Equation of a circle

    State the equation of a circle with centre (5, 4) and radius 3

    Answer: (x - 5)² + (y - 4)² = 9
  4. 4. Ratio Changing a ratio

    In ratio 5:3, if the second quantity is 25, what is the first?

    Answer: 41.7
  5. 5. Statistics Range

    Find the range of: -19, -3, 29, 39, -17

    Answer: 58

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