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Capstone · Grades 7–9 Keystones #39 24 July 2026 (today)
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Keystones — Capstone

Five GCSE retrieval questions · 24 July 2026 · mathsvault.uk/keystones

  1. 1. Number

    The sum of three consecutive numbers is 138. What are the numbers?

    Answer: 45, 46, and 47
  2. 2. Algebra

    Solve: x⁄2 = 8.5

    Answer: x = 17
  3. 3. Geometry

    Find c if a = 20cm and b = 21cm in a right triangle

    Answer: 29cm
  4. 4. Ratio

    Calculate 28.3% of 413

    Answer: 116.88
  5. 5. Statistics

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

    Answer: 1⁄5

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