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Lintel · Grades 5–7 Keystones #1 24 April 2014 Skills week 1 of 7
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Five GCSE retrieval questions · 24 April 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 880,000 in standard form

    Answer: 8.8 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 16x + 64

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

    Adjacent = 24cm, angle = 45°. Find opposite

    Answer: 24cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 14:12 as a fraction in simplest form

    Answer: 6⁄13
  5. 5. Statistics Mean

    The mean of 4 numbers is 32. If 3 of them are 27, 35, 27, what is the missing number?

    Answer: 39

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