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Capstone · Grades 7–9 Keystones #223 11 August 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 11 August 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — powers of powers

    Simplify: ((a4)2)3

    Answer: a24
  2. 2. Algebra Quadratic nth term

    Determine the nth term: 9, 21, 41, 69, ...

    Answer: 4n² + 5
  3. 3. Geometry Equation of a circle

    State the equation of a circle with centre (2, 3) and radius 6

    Answer: (x - 2)² + (y - 3)² = 36
  4. 4. Ratio Changing a ratio

    In ratio 3:5, if the second quantity is 39, what is the first?

    Answer: 23.4
  5. 5. Statistics Range

    Find the range of: 16, 41, 21, -12, 22

    Answer: 53

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