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Capstone · Grades 7–9 Keystones #1 13 October 2025
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Keystones — Capstone

Five GCSE retrieval questions · 13 October 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⁄4 = 3.5

    Answer: x = 14
  3. 3. Geometry

    Find c if a = 20cm and b = 24cm in a right triangle

    Answer: 31.2cm
  4. 4. Ratio

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 2 red, 2 blue and 6 green sections. Probability of landing on red?

    Answer: 1⁄5

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