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Cornerstone · Grades 3–5 Keystones #1 8 April 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 April 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 60 + 69

    Answer: 60 + 69 = 129
  2. 2. Algebra

    For y = x³ + 12, calculate y when x = 3

    Answer: y = 39
  3. 3. Geometry

    Calculate the area of a circle with diameter 21cm

    Answer: 346.36cm²
  4. 4. Ratio

    Simplify: 8:8:6

    Answer: 4:4:3
  5. 5. Statistics

    Calculate the mean of: 13, 43, 15, 22, 35, 5, 7, 49

    Answer: 23.6