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Capstone · Grades 7–9 Keystones #90 31 March 2026
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Keystones — Capstone

Five GCSE retrieval questions · 31 March 2026 · 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⁄7 = 3.2857142857143

    Answer: x = 23
  3. 3. Geometry

    Find c if a = 14cm and b = 11cm in a right triangle

    Answer: 17.8cm
  4. 4. Ratio

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics

    A spinner has 4 red, 3 blue and 3 green sections. Probability of landing on red?

    Answer: 2⁄5

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