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Capstone · Grades 7–9 Keystones #29 29 January 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 29 January 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — powers of powers

    Simplify: ((a2)3)3

    Answer: a18
  2. 2. Algebra Quadratic nth term

    Determine the nth term: 6, 12, 22, 36, ...

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

    State the equation of a circle with centre (7, 7) and radius 9

    Answer: (x - 7)² + (y - 7)² = 81
  4. 4. Ratio Changing a ratio

    In ratio 4:5, if the second quantity is 50, what is the first?

    Answer: 40
  5. 5. Statistics Range

    Find the range of: -11, 20, 9, 14, -24

    Answer: 44

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