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Cornerstone · Grades 3–5 Keystones #223 11 August 2026 Skills week 5 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 August 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: 84 × 83

    Answer: 87
  2. 2. Algebra Unknowns on both sides

    Solve: 6x + 5 = x + 30

    Answer: x = 5
  3. 3. Geometry Converting mixed metric units

    Convert 13m to cm

    Answer: 1300cm
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 30:10

    Answer: 3:1
  5. 5. Statistics Expected frequency

    A die is rolled 78 times. How many times would you expect to get a 6?

    Answer: 13

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