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Cornerstone · Grades 3–5 Keystones #113 23 April 2026
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Keystones — Cornerstone

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

  1. 1. Number

    Calculate: 2⁄9 + 3⁄9

    Answer: 5⁄9
  2. 2. Algebra

    For y = x³, find y when x = 5

    Answer: y = 125
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm, 8cm, 10cm

    Answer: 24cm
  4. 4. Ratio

    Simplify the ratio 20:35

    Answer: 4:7
  5. 5. Statistics

    Calculate the range of: 81, 96, 45, 96, 45, 53

    Answer: 51

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