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Cornerstone · Grades 3–5 Keystones #1 15 January 2022
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 January 2022 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 51 + ? = 189

    Answer: 138
  2. 2. Algebra

    What is the next term? 8, 24, 72, 216, ...

    Answer: 648
  3. 3. Geometry

    Opposite = 12cm, adjacent = 18cm. Calculate the angle

    Answer: 33.7°
  4. 4. Ratio

    Find 15% of 84

    Answer: 12.6
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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