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Lintel · Grades 5–7 Keystones #1 3 June 2010 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 3 June 2010 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 71,000,000 in standard form

    Answer: 7.1 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 5x + 4

    Answer: (x - 1)(x - 4)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 30cm, angle = 53°. Find opposite. Give your answer to 2 decimal places

    Answer: 39.81cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 9:18:9

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

    Calculate the mean of: 38, 32, 35, 42, 43, 36, 19

    Answer: 35

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