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Lintel · Grades 5–7 Keystones #1 1 July 2022 Skills week 1 of 7
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Five GCSE retrieval questions · 1 July 2022 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    890000

    Answer: 8.9 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 3x - 18

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

    Hypotenuse = 33cm, angle = 32°. Find adjacent side

    Answer: 28cm
  4. 4. Ratio Mixed ratio problems

    In ratio 3:1:1, what fraction is the second part?

    Answer: 1⁄5
  5. 5. Statistics Mean

    Calculate the mean of: 9, 19, 45, 42, 31, 50

    Answer: 32.7

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