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Cornerstone · Grades 3–5 Keystones #128 8 May 2026 Skills week 5 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 May 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: x4 × x2

    Answer: x6
  2. 2. Algebra Unknowns on both sides

    Solve: 8x - 7 = 6x + 9

    Answer: x = 8
  3. 3. Geometry Converting mixed metric units

    Convert 9kg to g

    Answer: 9000g
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 24:15

    Answer: 8:5
  5. 5. Statistics Expected frequency

    A fair coin is flipped 142 times. How many heads would you expect?

    Answer: 71

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