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Cornerstone · Grades 3–5 Keystones #1 6 April 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 April 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 1⁄9 + 2⁄9

    Answer: 1⁄3
  2. 2. Algebra

    Solve: 7x - 12 = 5x + 6

    Answer: x = 9
  3. 3. Geometry

    Opposite = 20cm, adjacent = 17cm. Calculate the angle

    Answer: 49.6°
  4. 4. Ratio

    Simplify the ratio 24:32

    Answer: 3:4
  5. 5. Statistics

    Calculate the mean of: 42, 7, 43, 39, 35, 29, 31, 44

    Answer: 33.8

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