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Cornerstone · Grades 3–5 Keystones #274 1 October 2026 Skills week 5 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 October 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: 83 × 83

    Answer: 86
  2. 2. Algebra Unknowns on both sides

    Solve: 4x + 7 = 2x + 25

    Answer: x = 9
  3. 3. Geometry Converting mixed metric units

    Convert 5219ml to litres

    Answer: 5.219 litres
  4. 4. Ratio Mixed ratio problems

    Divide 126 in the ratio 4:4:1

    Answer: 56, 56 and 14
  5. 5. Statistics Expected frequency

    A fair coin is flipped 114 times. How many heads would you expect?

    Answer: 57

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