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Lintel · Grades 5–7 Keystones #1 1 May 2015 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 1 May 2015 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    Write 91,000,000 in standard form

    Answer: 9.1 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 4x - 96

    Answer: (x + 12)(x - 8)
  3. 3. Geometry SOHCAHTOA — missing length

    Adjacent = 13cm, angle = 36°. Find opposite. Give your answer to 2 decimal places

    Answer: 9.45cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 6:8:12

    Answer: 3:4:6
  5. 5. Statistics Mean

    Calculate the mean of: 42, 40, 7, 8, 17, 7. Give your answer to 2 decimal places

    Answer: 20.17

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