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Lintel · Grades 5–7 Keystones #1 21 February 2022 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 21 February 2022 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    8000000

    Answer: 8 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + x - 30

    Answer: (x + 6)(x - 5)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 12cm, angle = 45°. Find opposite

    Answer: 12cm
  4. 4. Ratio Mixed ratio problems

    In ratio 1:4:2, what fraction is the second part?

    Answer: 4⁄7
  5. 5. Statistics Mean

    Calculate the mean of: 29, 48, 29, 30, 6, 19, 30

    Answer: 27.3

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