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Lintel · Grades 5–7 Keystones #1 24 October 2025
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Keystones — Lintel

Five GCSE retrieval questions · 24 October 2025 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 94 + ? = 165

    Answer: 71
  2. 2. Algebra

    Solve: 5x = 55

    Answer: x = 11
  3. 3. Geometry

    Find c if a = 16cm and b = 11cm in a right triangle

    Answer: 19.4cm
  4. 4. Ratio

    Simplify: 8:20:20

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

    A bag has 7 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄10

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