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Lintel · Grades 5–7 Keystones #1 15 January 2025
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Keystones — Lintel

Five GCSE retrieval questions · 15 January 2025 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 450 + 511

    Answer: 450 + 511 = 961
  2. 2. Algebra

    Find the next term: 1, 3, 7, 13, ...

    Answer: 21
  3. 3. Geometry

    Find c if a = 15cm and b = 23cm in a right triangle

    Answer: 27.5cm
  4. 4. Ratio

    Simplify: 18:18:12

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

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

    Answer: 8⁄13

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