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Lintel · Grades 5–7 Keystones #1 6 August 2021
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Keystones — Lintel

Five GCSE retrieval questions · 6 August 2021 · mathsvault.uk/keystones

  1. 1. Number

    The sum of three consecutive numbers is 117. What are the numbers?

    Answer: 38, 39, and 40
  2. 2. Algebra

    Solve: x⁄3 = 5.6666666666667

    Answer: x = 17
  3. 3. Geometry

    Find perimeter: adjacent = 11cm, angle = 38°

    Answer: 33.6cm
  4. 4. Ratio

    Simplify the ratio 5m:500cm

    Answer: 1:100
  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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