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Cornerstone · Grades 3–5 Keystones #4 4 January 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 January 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 24 + 61

    Answer: 24 + 61 = 85
  2. 2. Algebra

    Factorise: 40x + 40

    Answer: 5(8x + 8)
  3. 3. Geometry

    Opposite = 9cm, adjacent = 14cm. Calculate the angle

    Answer: 32.7°
  4. 4. Ratio

    Simplify: 12:18:15

    Answer: 4:6:5
  5. 5. Statistics

    Find the mean of: 11, 13, 2, 13

    Answer: 9.75