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Lintel · Grades 5–7 Keystones #1 26 June 2013 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 26 June 2013 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 35,000 in standard form

    Answer: 3.5 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 6x - 16

    Answer: (x + 8)(x - 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 38cm, angle = 35°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 31.13cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 10:4:8

    Answer: 5:2:4
  5. 5. Statistics Mean

    Calculate the mean of: 21, 25, 19, 49, 36, 22, 50. Give your answer to 2 decimal places

    Answer: 31.71

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