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Capstone · Grades 7–9 Keystones #277 4 October 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 4 October 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: 10, 22, 42, 70, ...

    Answer: 4n² + 6
  3. 3. Geometry Equation of a circle

    State the equation of a circle with centre (2, 7) and radius 4

    Answer: (x - 2)² + (y - 7)² = 16
  4. 4. Ratio Changing a ratio

    In ratio 2:1, if the second quantity is 60, what is the first?

    Answer: 120
  5. 5. Statistics Range

    Find the range of: 47, 7, -20, 18, -23

    Answer: 70

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