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Capstone · Grades 7–9 Keystones #1 20 November 2021
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Keystones — Capstone

Five GCSE retrieval questions · 20 November 2021 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: y2 × y4 × y4

    Answer: y10
  2. 2. Algebra

    Factorise fully: 14x² + 6x

    Answer: 2x(7x + 3)
  3. 3. Geometry

    Find the distance between (-7, -5) and (4, 4)

    Answer: 14.21
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 5 numbers is 32. If 4 of them are 49, 19, 17, 27, what is the missing number?

    Answer: 48

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