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Cornerstone · Grades 3–5 Keystones #1 18 October 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 October 2021 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: x4 × x4

    Answer: x8
  2. 2. Algebra

    Solve: 7x = 91

    Answer: x = 13
  3. 3. Geometry

    Opposite = 12cm, adjacent = 20cm. Calculate the angle

    Answer: 31°
  4. 4. Ratio

    Simplify: 20:24:24

    Answer: 5:6:6
  5. 5. Statistics

    Find the mean of: 15, 19, 6, 6

    Answer: 11.5

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