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Cornerstone · Grades 3–5 Keystones #125 5 May 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 5 May 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 33 + 86

    Answer: 33 + 86 = 119
  2. 2. Algebra

    Solve: x + 14 = 26

    Answer: x = 12
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 8cm and 12cm

    Answer: 34.4cm
  4. 4. Ratio

    Simplify the ratio 4:12

    Answer: 1:3
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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