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Cornerstone · Grades 3–5 Keystones #1 13 September 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 September 2021 · mathsvault.uk/keystones

  1. 1. Number

    Add: 1⁄8 + 4⁄6

    Answer: 19⁄24
  2. 2. Algebra

    Expand: 3(6x + 3)

    Answer: 18x + 9
  3. 3. Geometry

    Calculate perimeter: two sides are 7cm and 9cm at right angles

    Answer: 27.4cm
  4. 4. Ratio

    Find 26% of 119

    Answer: 30.94
  5. 5. Statistics

    What is the probability of rolling a 3 on a fair die?

    Answer: 1⁄6

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