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Lintel · Grades 5–7 Keystones #1 9 March 2014 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 9 March 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 46,000,000 in standard form

    Answer: 4.6 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 19x + 88

    Answer: (x - 8)(x - 11)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 30cm, angle = 47°. Find opposite. Give your answer to 2 decimal places

    Answer: 32.17cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 8:8:12

    Answer: 2:2:3
  5. 5. Statistics Mean

    Calculate the mean of: 26, 50, 11, 36, 49, 34. Give your answer to 2 decimal places

    Answer: 34.33

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