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Cornerstone · Grades 3–5 Keystones #1 12 October 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 October 2025 · mathsvault.uk/keystones

  1. 1. Number

    Simplify: 23 × 24

    Answer: 27
  2. 2. Algebra

    What is the next term? 6, 12, 24, 48, ...

    Answer: 96
  3. 3. Geometry

    Opposite = 13cm, hypotenuse = 15cm. Find the angle

    Answer: 60° (approximately)
  4. 4. Ratio

    Find 81% of 73

    Answer: 59.13
  5. 5. Statistics

    A bag has 5 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄13

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