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Lintel · Grades 5–7 Keystones #1 20 March 2016 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 20 March 2016 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 3,600,000 in standard form

    Answer: 3.6 × 106
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 3x - 54

    Answer: (x + 9)(x - 6)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 11cm, angle = 56°. Find opposite. Give your answer to 2 decimal places

    Answer: 16.31cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 9:9:6

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

    Calculate the mean of: 39, 28, 20, 49, 17, 14, 17. Give your answer to 2 decimal places

    Answer: 26.29

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