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Lintel · Grades 5–7 Keystones #1 23 August 2012 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 23 August 2012 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 40,000,000 in standard form

    Answer: 4 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 2x - 3

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

    Hypotenuse = 21cm, angle = 56°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 11.74cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 7:4 as a fraction in simplest form

    Answer: 4⁄11
  5. 5. Statistics Mean

    Calculate the mean of: 27, 37, 30, 16, 8, 20, 27. Give your answer to 2 decimal places

    Answer: 23.57

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