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Lintel · Grades 5–7 Keystones #1 8 October 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 8 October 2016 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 59,000 in standard form

    Answer: 5.9 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - x - 6

    Answer: (x + 2)(x - 3)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 30cm, angle = 31°. Find opposite. Give your answer to 2 decimal places

    Answer: 18.03cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 18:18:12

    Answer: 3:3:2
  5. 5. Statistics Mean

    Calculate the mean of: 42, 22, 48, 14, 44, 19, 35

    Answer: 32

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