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Cornerstone · Grades 3–5 Keystones #1 15 July 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 July 2023 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: x6 × x3

    Answer: x9
  2. 2. Algebra

    Collect like terms: 2x + 7y + 4x + 3y

    Answer: 6x + 10y
  3. 3. Geometry

    Calculate the area of a circle with diameter 24cm

    Answer: 452.39cm²
  4. 4. Ratio

    Simplify the ratio 10:6

    Answer: 5:3
  5. 5. Statistics

    Calculate the mean of: 7, 42, 27, 39, 39, 10

    Answer: 27.3

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