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Lintel · Grades 5–7 Keystones #1 9 December 2012 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 9 December 2012 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 68,000 in standard form

    Answer: 6.8 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 12x + 11

    Answer: (x + 11)(x + 1)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 32cm, angle = 36°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 25.89cm
  4. 4. Ratio Mixed ratio problems

    In ratio 12:1:6, what fraction is the second part?

    Answer: 1⁄19
  5. 5. Statistics Mean

    Calculate the mean of: 24, 14, 44, 34, 26, 23, 15. Give your answer to 2 decimal places

    Answer: 25.71

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