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Lintel · Grades 5–7 Keystones #249 6 September 2026 Skills week 1 of 7
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Five GCSE retrieval questions · 6 September 2026 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    190000

    Answer: 1.9 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 9x + 14

    Answer: (x - 2)(x - 7)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 20cm, angle = 46°. Find opposite

    Answer: 20.7cm
  4. 4. Ratio Mixed ratio problems

    Express the first part of 3:6 as a fraction in simplest form

    Answer: 1⁄3
  5. 5. Statistics Mean

    Calculate the mean of: 48, 31, 24, 12, 49, 32, 23, 50

    Answer: 33.6

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