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Cornerstone · Grades 3–5 Keystones #1 27 December 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 December 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 7⁄12 + 3⁄12

    Answer: 5⁄6
  2. 2. Algebra

    Simplify: 2x + 6x

    Answer: 8x
  3. 3. Geometry

    Calculate the area of a circle with diameter 16cm

    Answer: 201.06cm²
  4. 4. Ratio

    Find 20% of 81

    Answer: 16.2
  5. 5. Statistics

    Find the mean of: 3, 16, 20

    Answer: 13

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