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Lintel · Grades 5–7 Keystones #1 21 May 2021 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 21 May 2021 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    85000

    Answer: 8.5 × 104
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 9x + 14

    Answer: (x - 7)(x - 2)
  3. 3. Geometry SOHCAHTOA — missing length

    Hypotenuse = 38cm, angle = 42°. Find adjacent side

    Answer: 28.2cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 15:9:9

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

    Calculate the mean of: 32, 26, 8, 39, 41, 30

    Answer: 29.3

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