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Lintel · Grades 5–7 Keystones #112 22 April 2026
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Keystones — Lintel

Five GCSE retrieval questions · 22 April 2026 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 55 + ? = 125

    Answer: 70
  2. 2. Algebra

    Solve: 2x = 28

    Answer: x = 14
  3. 3. Geometry

    Find c if a = 20cm and b = 18cm in a right triangle

    Answer: 26.9cm
  4. 4. Ratio

    Simplify the ratio 7m:700cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 6 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 1⁄2

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