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Lintel · Grades 5–7 Keystones #1 2 January 2017 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 2 January 2017 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 26,000,000 in standard form

    Answer: 2.6 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 3x - 54

    Answer: (x + 6)(x - 9)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 26cm, angle = 62°. Find adjacent side. Give your answer to 2 decimal places

    Answer: 12.21cm
  4. 4. Ratio Mixed ratio problems

    Express the second part of 6:13 as a fraction in simplest form

    Answer: 13⁄19
  5. 5. Statistics Mean

    Calculate the mean of: 31, 30, 15, 29, 42, 22. Give your answer to 2 decimal places

    Answer: 28.17

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