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Lintel · Grades 5–7 Keystones #1 6 May 2019 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 6 May 2019 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    78000000

    Answer: 7.8 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 6x + 9

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

    Adjacent = 11cm, angle = 45°. Find opposite

    Answer: 11cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 12:18:12

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

    Calculate the mean of: 18, 46, 18, 9, 12, 21

    Answer: 20.7

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