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Lintel · Grades 5–7 Keystones #141 21 May 2026
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Keystones — Lintel

Five GCSE retrieval questions · 21 May 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 1⁄4 + 5⁄6 + 3⁄4

    Answer: 11⁄6
  2. 2. Algebra

    Factorise fully: 18x² + 12x

    Answer: 3x(6x + 4)
  3. 3. Geometry

    Calculate the area of a right triangle with perpendicular sides 11cm and 11cm

    Answer: 60.5cm²
  4. 4. Ratio

    Simplify: 16:8:24

    Answer: 2:1:3
  5. 5. Statistics

    A bag has 6 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 6⁄11

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