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Lintel · Grades 5–7 Keystones #1 14 January 2019 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 14 January 2019 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    250000

    Answer: 2.5 × 105
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² + 7x - 8

    Answer: (x + 8)(x - 1)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 38cm, angle = 63°. Find adjacent side

    Answer: 17.3cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 18:15:15

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

    Calculate the mean of: 45, 28, 47, 17, 14, 36, 34

    Answer: 31.6

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