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Lintel · Grades 5–7 Keystones #1 15 August 2021 Skills week 1 of 7
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Keystones — Lintel

Five GCSE retrieval questions · 15 August 2021 · mathsvault.uk/keystones

  1. 1. Number Converting to standard form

    24000000

    Answer: 2.4 × 107
  2. 2. Algebra Factorising monic quadratics

    Factorise: x² - 5x + 6

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

    Hypotenuse = 38cm, angle = 58°. Find adjacent side

    Answer: 20.cm
  4. 4. Ratio Mixed ratio problems

    Simplify: 18:18:9

    Answer: 2:2:1
  5. 5. Statistics Mean

    Calculate the mean of: 14, 17, 50, 5, 21, 11

    Answer: 19.7

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