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Capstone · Grades 7–9 Keystones #79 20 March 2026 Skills week 5 of 7
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Keystones — Capstone

Five GCSE retrieval questions · 20 March 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — powers of powers

    Simplify: ((a2)2)3

    Answer: a12
  2. 2. Algebra Quadratic nth term

    Determine the nth term: 10, 16, 26, 40, ...

    Answer: 2n² + 8
  3. 3. Geometry Equation of a circle

    State the equation of a circle with centre (7, 3) and radius 4

    Answer: (x - 7)² + (y - 3)² = 16
  4. 4. Ratio Changing a ratio

    In ratio 4:5, if the second quantity is 31, what is the first?

    Answer: 24.8
  5. 5. Statistics Range

    Find the range of: 2, 34, 27, 20, -12

    Answer: 46

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