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Cornerstone · Grades 3–5 Keystones #1 14 December 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 December 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra

    Expand: 3(x + 8)

    Answer: 3x + 24
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Simplify: 10:6:6

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

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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