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Cornerstone · Grades 3–5 Keystones #1 7 September 2025
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 September 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 51 + 47

    Answer: 51 + 47 = 98
  2. 2. Algebra

    Collect like terms: 3x + 4y + 4x + 8y

    Answer: 7x + 12y
  3. 3. Geometry

    Calculate the hypotenuse when a = 8cm and b = 7cm

    Answer: 10.63cm
  4. 4. Ratio

    Simplify the ratio 14:4

    Answer: 7:2
  5. 5. Statistics

    What is the probability of rolling a 4 on a fair die?

    Answer: 1⁄6

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