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Cornerstone · Grades 3–5 Keystones #1 20 July 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 July 2022 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 58 + 51

    Answer: 58 + 51 = 109
  2. 2. Algebra

    Factorise: 8x² + 9x

    Answer: x(8x + 9)
  3. 3. Geometry

    Calculate the perimeter of a right triangle with sides 6cm and 7cm

    Answer: 22.2cm
  4. 4. Ratio

    Simplify the ratio 32:8

    Answer: 4:1
  5. 5. Statistics

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

    Answer: 1⁄6

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