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Lintel · Grades 5–7 Keystones #1 4 June 2012 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 4 June 2012 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 61,000 in standard form

    Answer: 6.1 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 6x + 8

    Answer: (x - 2)(x - 4)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 15cm, angle = 37°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 11.98cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 15:15:18

    Answer: 5:5:6
  5. 5. Statistics Mean

    Calculate the mean of: 28, 46, 28, 36, 38, 6, 34. Give your answer to 2 decimal places

    Answer: 30.86

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