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Lintel · Grades 5–7 Keystones #1 18 April 2024
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Keystones — Lintel

Five GCSE retrieval questions · 18 April 2024 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 48 + ? = 116

    Answer: 68
  2. 2. Algebra

    Factorise: 8x² + 8x

    Answer: 8x(x + 1)
  3. 3. Geometry

    Calculate the hypotenuse when a = 10cm and b = 12cm

    Answer: 15.62cm
  4. 4. Ratio

    Simplify: 20:20:24

    Answer: 5:5:6
  5. 5. Statistics

    A bag has 7 red and 6 blue balls. What is the probability of picking a red ball?

    Answer: 7⁄13

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