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Lintel · Grades 5–7 Keystones #1 8 October 2021
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Five GCSE retrieval questions · 8 October 2021 · mathsvault.uk/keystones

  1. 1. Number

    The temperature is -13°C. It rises by 8°C. What is the new temperature?

    Answer: -5°C
  2. 2. Algebra

    Solve: x⁄5 = 3.8

    Answer: x = 19
  3. 3. Geometry

    A circle has area 706.9cm². Find its radius (dp)

    Answer: 15cm
  4. 4. Ratio

    Simplify the ratio 8m:800cm

    Answer: 1:100
  5. 5. Statistics

    A bag has 6 red and 8 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄7

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