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Lintel · Grades 5–7 Keystones #1 30 April 2014 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 30 April 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 8,000,000 in standard form

    Answer: 8 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 5x - 24

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

    Hypotenuse = 31cm, angle = 52°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 19.09cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 4:8:8

    Answer: 1:2:2
  5. 5. Statistics Mean

    Calculate the mean of: 19, 10, 12, 41, 26, 23. Give your answer to 2 decimal places

    Answer: 21.83

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