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Cornerstone · Grades 3–5 Keystones #1 18 September 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 September 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 73 + ? = 151

    Answer: 78
  2. 2. Algebra

    Collect like terms: 8x + 5y + 3x + 8y

    Answer: 11x + 13y
  3. 3. Geometry

    Calculate the area of a circle with diameter 13cm

    Answer: 132.73cm²
  4. 4. Ratio

    Simplify: 24:8:24

    Answer: 3:1:3
  5. 5. Statistics

    What is the probability of rolling a 5 on a fair die?

    Answer: 1⁄6

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