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Capstone · Grades 7–9 Keystones #271 28 September 2026 (today) Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 28 September 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: 13, 22, 37, 58, ...

    Answer: 3n² + 10
  3. 3. Geometry Equation of a circle

    State the equation of a circle with centre (4, 7) and radius 9

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

    In ratio 7:4, if the second quantity is 24, what is the first?

    Answer: 42
  5. 5. Statistics Range

    Find the range of: -10, 28, 3, -15, 36

    Answer: 51

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