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Cornerstone · Grades 3–5 Keystones #1 6 September 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 44 + ? = 145

    Answer: 101
  2. 2. Algebra

    What is the next term? 5, 15, 45, 135, ...

    Answer: 405
  3. 3. Geometry

    Opposite = 14cm, hypotenuse = 28cm. Find the angle

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

    Simplify the ratio 12:4

    Answer: 3:1
  5. 5. Statistics

    A bag has 8 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄11

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