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Capstone · Grades 7–9 Keystones #157 6 June 2026
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Keystones — Capstone

Five GCSE retrieval questions · 6 June 2026 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: y5 × y5 × y5

    Answer: y15
  2. 2. Algebra

    Solve: x6 = 4.1666666666667

    Answer: x = 25
  3. 3. Geometry

    A right triangle has hypotenuse 10cm and one side 6cm. Find its area

    Answer: 24cm²
  4. 4. Ratio

    Simplify the ratio 4m:400cm

    Answer: 1:100
  5. 5. Statistics

    The mean of 6 numbers is 25. If 5 of them are 27, 50, 44, 34, 43, what is the missing number?

    Answer: -48