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Capstone · Grades 7–9 Keystones #224 12 August 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 12 August 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: 8, 20, 40, 68, ...

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

    State the equation of a circle with centre (4, 8) and radius 6

    Answer: (x - 4)² + (y - 8)² = 36
  4. 4. Ratio Changing a ratio

    In ratio 2:1, if the second quantity is 37, what is the first?

    Answer: 74
  5. 5. Statistics Range

    Find the range of: -9, 18, 27, 27, -30

    Answer: 57

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