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Cornerstone · Grades 3–5 Keystones #1 19 October 2021
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 October 2021 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 85 + 91

    Answer: 85 + 91 = 176
  2. 2. Algebra

    Simplify: 7x + 7x

    Answer: 14x
  3. 3. Geometry

    Find the area of a circle with radius 7cm

    Answer: 153.94cm²
  4. 4. Ratio

    Simplify: 12:4:10

    Answer: 6:2:5
  5. 5. Statistics

    A bag has 5 red and 3 blue balls. What is the probability of picking a red ball?

    Answer: 5⁄8

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