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Lintel · Grades 5–7 Keystones #1 30 April 2025
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Keystones — Lintel

Five GCSE retrieval questions · 30 April 2025 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 81 + ? = 107

    Answer: 26
  2. 2. Algebra

    Solve: 6x = 30

    Answer: x = 5
  3. 3. Geometry

    Calculate the hypotenuse when a = 4cm and b = 13cm

    Answer: 13.6cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 6 red and 4 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄5

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