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Capstone · Grades 7–9 Keystones #1 2 July 2025
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Keystones — Capstone

Five GCSE retrieval questions · 2 July 2025 · mathsvault.uk/keystones

  1. 1. Number

    The sum of three consecutive numbers is 90. What are the numbers?

    Answer: 29, 30, and 31
  2. 2. Algebra

    Solve: x⁄3 = 5.6666666666667

    Answer: x = 17
  3. 3. Geometry

    Find c if a = 16cm and b = 20cm in a right triangle

    Answer: 25.6cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 3 red, 6 blue and 3 green sections. Probability of landing on red?

    Answer: 1⁄4

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