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Capstone · Grades 7–9 Keystones #1 6 October 2025
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Keystones — Capstone

Five GCSE retrieval questions · 6 October 2025 · mathsvault.uk/keystones

  1. 1. Number

    The sum of three consecutive numbers is 120. What are the numbers?

    Answer: 39, 40, and 41
  2. 2. Algebra

    Solve: x⁄7 = 5.7142857142857

    Answer: x = 40
  3. 3. Geometry

    A right triangle has hypotenuse 5cm and one side 3cm. Find its area

    Answer: 6cm²
  4. 4. Ratio

    Simplify the ratio 2m:200cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 2 red, 4 blue and 5 green sections. Probability of landing on red?

    Answer: 2⁄11

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