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Cornerstone · Grades 3–5 Keystones #1 28 June 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 June 2023 · mathsvault.uk/keystones

  1. 1. Number

    640000

    Answer: 6.4 × 105
  2. 2. Algebra

    Simplify: 4x + 8x

    Answer: 12x
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 8cm and 8cm

    Answer: 27.3cm
  4. 4. Ratio

    Calculate 10% of 53

    Answer: 5.3
  5. 5. Statistics

    Calculate the mean of: 16, 23, 16, 14, 15, 25, 26, 27

    Answer: 20.3

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