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Lintel · Grades 5–7 Keystones #1 29 December 2016 Skills week 1 of 7
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Five GCSE retrieval questions · 29 December 2016 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 590,000,000 in standard form

    Answer: 5.9 × 108
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 5x - 24

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

    Adjacent = 25cm, angle = 44°. Find opposite. Give your answer to 2 decimal places

    Answer: 24.14cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 6:6:8

    Answer: 3:3:4
  5. 5. Statistics Mean

    Calculate the mean of: 11, 28, 36, 5, 49, 37. Give your answer to 2 decimal places

    Answer: 27.67

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