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Cornerstone · Grades 3–5 Keystones #51 20 February 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 February 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 47 + 65

    Answer: 47 + 65 = 112
  2. 2. Algebra

    Find the next term: 7, 11, 15, 19, ...

    Answer: 23
  3. 3. Geometry

    Calculate the area of a circle with diameter 24cm

    Answer: 452.39cm²
  4. 4. Ratio

    Find 21% of 279

    Answer: 58.59
  5. 5. Statistics

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

    Answer: 1⁄2

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