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Capstone · Grades 7–9 Keystones #2 2 January 2026
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Keystones — Capstone

Five GCSE retrieval questions · 2 January 2026 · mathsvault.uk/keystones

  1. 1. Number

    If x4 = 81, what is x?

    Answer: 3
  2. 2. Algebra

    Solve: x⁄3 = 5

    Answer: x = 15
  3. 3. Geometry

    A right triangle has hypotenuse 17cm and one side 8cm. Find its area

    Answer: 60cm²
  4. 4. Ratio

    Calculate 23.1% of 453

    Answer: 104.64
  5. 5. Statistics

    A spinner has 6 red, 4 blue and 6 green sections. Probability of landing on red?

    Answer: 3⁄8

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