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Lintel · Grades 5–7 Keystones #1 4 July 2025
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Keystones — Lintel

Five GCSE retrieval questions · 4 July 2025 · mathsvault.uk/keystones

  1. 1. Number

    The sum of three consecutive numbers is 108. What are the numbers?

    Answer: 35, 36, and 37
  2. 2. Algebra

    Solve: x⁄2 = 11.5

    Answer: x = 23
  3. 3. Geometry

    Calculate the area of a circle with diameter 8cm

    Answer: 50.27cm²
  4. 4. Ratio

    Simplify: 8:20:20

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

    A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄13

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