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Cornerstone · Grades 3–5 Keystones #275 2 October 2026 Skills week 5 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 October 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: x5 × x5

    Answer: x10
  2. 2. Algebra Unknowns on both sides

    Solve: 9x + 6 = 2x + 90

    Answer: x = 12
  3. 3. Geometry Converting mixed metric units

    Convert 10kg to g

    Answer: 10000g
  4. 4. Ratio Mixed ratio problems

    Simplify: 8:20:16

    Answer: 2:5:4
  5. 5. Statistics Expected frequency

    A fair coin is flipped 94 times. How many heads would you expect?

    Answer: 47

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