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Cornerstone · Grades 3–5 Keystones #1 29 August 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 August 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 83 + 88

    Answer: 83 + 88 = 171
  2. 2. Algebra

    For y = x³ + 4, calculate y when x = 2

    Answer: y = 12
  3. 3. Geometry

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio

    Simplify: 8:8:12

    Answer: 2:2:3
  5. 5. Statistics

    What is the probability of getting heads when flipping a fair coin?

    Answer: 1⁄2

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