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Lintel · Grades 5–7 Keystones #1 1 May 2025 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 1 May 2025 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    33000

    Answer: 3.3 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 2x - 48

    Answer: (x + 8)(x - 6)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 18cm, angle = 56°. Find opposite

    Answer: 26.7cm
  4. 4. Ratio Mixed ratio problems

    In ratio 2:3:2, what fraction is the second part?

    Answer: 3⁄7
  5. 5. Statistics Mean

    Calculate the mean of: 38, 43, 19, 15, 6, 19, 48, 29

    Answer: 27.1

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