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Cornerstone · Grades 3–5 Keystones #42 27 July 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 July 2026 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: x5 × x5

    Answer: x10
  2. 2. Algebra

    Expand: 3(x + 9)

    Answer: 3x + 27
  3. 3. Geometry

    Find the area of a circle with radius 6cm

    Answer: 113.cm²
  4. 4. Ratio

    Simplify the ratio 25:35

    Answer: 5:7
  5. 5. Statistics

    Find the mean of: 19, 10, 8

    Answer: 12.333333333333

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