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Cornerstone · Grades 3–5 Keystones #1 18 July 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 July 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 3⁄9 + 5⁄9

    Answer: 8⁄9
  2. 2. Algebra

    Collect like terms: 2x + 3y + 8x + 3y

    Answer: 10x + 6y
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 6cm and 10cm

    Answer: 30cm²
  4. 4. Ratio

    Simplify the ratio 35:40

    Answer: 7:8
  5. 5. Statistics

    Find the range of: 18, 22, 22, 5, 17

    Answer: 17

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