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Cornerstone · Grades 3–5 Keystones #1 26 March 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 March 2023 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 66 + ? = 141

    Answer: 75
  2. 2. Algebra

    Solve: 4x = 16

    Answer: x = 4
  3. 3. Geometry

    Opposite = 10cm, adjacent = 13cm. Calculate the angle

    Answer: 37.6°
  4. 4. Ratio

    Simplify the ratio 25:35

    Answer: 5:7
  5. 5. Statistics

    A bag has 7 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄10

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