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Lintel · Grades 5–7 Keystones #1 3 March 2025
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Keystones — Lintel

Five GCSE retrieval questions · 3 March 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 335 + 920

    Answer: 335 + 920 = 1255
  2. 2. Algebra

    Factorise: 4x² + 9x

    Answer: x(4x + 9)
  3. 3. Geometry

    A circle has area 452.4cm². Find its radius (dp)

    Answer: 12cm
  4. 4. Ratio

    Simplify: 8:10:10

    Answer: 4:5:5
  5. 5. Statistics

    A bag has 4 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 49