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Cornerstone · Grades 3–5 Keystones #30 30 January 2026 Skills week 5 of 7
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Five GCSE retrieval questions · 30 January 2026 · mathsvault.uk/keystones

  1. 1. Number Index law — multiplication

    Simplify: 84 × 85

    Answer: 89
  2. 2. Algebra Unknowns on both sides

    Solve: 5x - 11 = 3x + -7

    Answer: x = 2
  3. 3. Geometry Converting mixed metric units

    Convert 2.5kg to g

    Answer: 2500g
  4. 4. Ratio Mixed ratio problems

    Simplify: 6:15:15

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

    A fair coin is flipped 152 times. How many heads would you expect?

    Answer: 76

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