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Cornerstone · Grades 3–5 Keystones #23 23 January 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 January 2026 · mathsvault.uk/keystones

  1. 1. Number

    49000000

    Answer: 4.9 × 107
  2. 2. Algebra

    Simplify: 2x + 2x

    Answer: 4x
  3. 3. Geometry

    Opposite = 17cm, adjacent = 11cm. Calculate the angle

    Answer: 57.1°
  4. 4. Ratio

    Simplify the ratio 30:10

    Answer: 3:1
  5. 5. Statistics

    Find the range of: 15, 28, 36, 27, 15

    Answer: 21

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