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Lintel · Grades 5–7 Keystones #1 28 May 2020 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 28 May 2020 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    200000

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

    Factorise: x² + 5x - 24

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

    Adjacent = 29cm, angle = 44°. Find opposite

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

    In ratio 2:3:1, what fraction is the second part?

    Answer: 3⁄6
  5. 5. Statistics Mean

    Calculate the mean of: 5, 26, 37, 7, 35, 34

    Answer: 24

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