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Lintel · Grades 5–7 Keystones #1 22 February 2025
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Keystones — Lintel

Five GCSE retrieval questions · 22 February 2025 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 45 + ? = 105

    Answer: 60
  2. 2. Algebra

    Solve: 5x = 20

    Answer: x = 4
  3. 3. Geometry

    Calculate perimeter: two sides are 12cm and 7cm at right angles

    Answer: 32.9cm
  4. 4. Ratio

    Calculate 33.6% of 670

    Answer: 225.12
  5. 5. Statistics

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

    Answer: 1⁄2

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