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Cornerstone · Grades 3–5 Keystones #1 1 October 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 October 2023 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 61 + ? = 118

    Answer: 57
  2. 2. Algebra

    Solve: 8x = 24

    Answer: x = 3
  3. 3. Geometry

    Opposite = 20cm, adjacent = 20cm. Calculate the angle

    Answer: 45°
  4. 4. Ratio

    Simplify the ratio 21:18

    Answer: 7:6
  5. 5. Statistics

    A bag has 7 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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