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Capstone · Grades 7–9 Keystones #274 1 October 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 1 October 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — powers of powers

    Simplify: ((a4)2)2

    Answer: a16
  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 (6, 2) and radius 5

    Answer: (x - 6)² + (y - 2)² = 25
  4. 4. Ratio Changing a ratio

    In ratio 2:1, if the second quantity is 26, what is the first?

    Answer: 52
  5. 5. Statistics Range

    Find the range of: -12, 20, 4, -4, -17

    Answer: 37

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