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Lintel · Grades 5–7 Keystones #1 12 November 2021
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Keystones — Lintel

Five GCSE retrieval questions · 12 November 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 966 + 918

    Answer: 966 + 918 = 1884
  2. 2. Algebra

    Expand: 2(5x + 9)

    Answer: 10x + 18
  3. 3. Geometry

    Find c if a = 15cm and b = 10cm in a right triangle

    Answer: 18cm
  4. 4. Ratio

    Simplify: 24:12:24

    Answer: 2:1:2
  5. 5. Statistics

    A bag has 6 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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