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Lintel · Grades 5–7 Keystones #1 2 July 2013 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 2 July 2013 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 790,000 in standard form

    Answer: 7.9 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + x - 20

    Answer: (x + 5)(x - 4)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 26cm, angle = 59°. Find opposite. Give your answer to 2 decimal places

    Answer: 43.27cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 18:15:18

    Answer: 6:5:6
  5. 5. Statistics Mean

    Calculate the mean of: 9, 37, 41, 11, 24, 18, 32. Give your answer to 2 decimal places

    Answer: 24.57

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