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Cornerstone · Grades 3–5 Keystones #1 25 March 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 March 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 2⁄6 + 1⁄6

    Answer: 1⁄2
  2. 2. Algebra

    Factorise: 6x² + 8x

    Answer: 2x(3x + 4)
  3. 3. Geometry

    Calculate the area of a circle with diameter 22cm

    Answer: 380.13cm²
  4. 4. Ratio

    Simplify: 12:24:8

    Answer: 3:6:2
  5. 5. Statistics

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

    Answer: 1⁄2

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