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Cornerstone · Grades 3–5 Keystones #1 30 August 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 August 2021 · mathsvault.uk/keystones

  1. 1. Number

    Add: 2⁄3 + 3⁄7

    Answer: 23⁄21
  2. 2. Algebra

    Simplify: 2x + 3x

    Answer: 5x
  3. 3. Geometry

    Opposite = 6cm, hypotenuse = 12cm. Find the angle

    Answer: 30° (approximately)
  4. 4. Ratio

    Calculate 10% of 159

    Answer: 15.9
  5. 5. Statistics

    A bag has 6 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄5

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