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Cornerstone · Grades 3–5 Keystones #1 12 September 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 September 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 178 + 915

    Answer: 178 + 915 = 1093
  2. 2. Algebra

    Solve: 7x = 63

    Answer: x = 9
  3. 3. Geometry

    Opposite = 8cm, adjacent = 11cm. Calculate the angle

    Answer: 36°
  4. 4. Ratio

    Simplify the ratio 24:6

    Answer: 4:1
  5. 5. Statistics

    Find the mean of: 18, 3, 8

    Answer: 9.6666666666667