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Lintel · Grades 5–7 Keystones #1 5 January 2023
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Keystones — Lintel

Five GCSE retrieval questions · 5 January 2023 · mathsvault.uk/keystones

  1. 1. Number

    What is the missing number: 33 + ? = 121

    Answer: 88
  2. 2. Algebra

    Solve: x⁄5 = 5.8

    Answer: x = 29
  3. 3. Geometry

    A circle has area 254.5cm². Find its radius (dp)

    Answer: 9cm
  4. 4. Ratio

    Calculate 39.3% of 875

    Answer: 343.88
  5. 5. Statistics

    A bag has 8 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 8⁄15

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