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Lintel · Grades 5–7 Keystones #1 20 April 2023
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Keystones — Lintel

Five GCSE retrieval questions · 20 April 2023 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 51 + ? = 180

    Answer: 129
  2. 2. Algebra

    Solve: 4x = 20

    Answer: x = 5
  3. 3. Geometry

    Opposite = 18cm, adjacent = 20cm. Calculate the angle

    Answer: 42°
  4. 4. Ratio

    Simplify: 8:8:12

    Answer: 2:2:3
  5. 5. Statistics

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

    Answer: 1⁄2

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