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Cornerstone · Grades 3–5 Keystones #1 9 July 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 July 2023 · mathsvault.uk/keystones

  1. 1. Number

    Add: 6⁄8 + 5⁄6

    Answer: 19⁄12
  2. 2. Algebra

    Simplify: 3x + 4x

    Answer: 7x
  3. 3. Geometry

    Opposite = 8cm, hypotenuse = 9.2cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Simplify: 9:9:15

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

    A bag has 8 red and 5 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄13

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