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Cornerstone · Grades 3–5 Keystones #225 13 August 2026 Skills week 5 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 August 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: 92 × 93

    Answer: 95
  2. 2. Algebra Unknowns on both sides

    Solve: 6x - 9 = 4x + 11

    Answer: x = 10
  3. 3. Geometry Converting mixed metric units

    Convert 8 litres to ml

    Answer: 8000ml
  4. 4. Ratio Mixed ratio problems

    Simplify the ratio 20:10

    Answer: 2:1
  5. 5. Statistics Expected frequency

    A fair coin is flipped 74 times. How many heads would you expect?

    Answer: 37