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Lintel · Grades 5–7 Keystones #1 14 May 2014 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 14 May 2014 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 5,000,000 in standard form

    Answer: 5 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 13x + 30

    Answer: (x + 10)(x + 3)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 22cm, angle = 43°. Find opposite. Give your answer to 2 decimal places

    Answer: 20.52cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 18:12:18

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

    Calculate the mean of: 29, 40, 11, 33, 33, 28, 26. Give your answer to 2 decimal places

    Answer: 28.57

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