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Cornerstone · Grades 3–5 Keystones #1 7 February 2023
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Keystones — Cornerstone

Five GCSE retrieval questions · 7 February 2023 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 858 + 276

    Answer: 858 + 276 = 1134
  2. 2. Algebra

    Solve: 7x = 21

    Answer: x = 3
  3. 3. Geometry

    Find the distance between (2, 5) and (5, 9)

    Answer: 5
  4. 4. Ratio

    Simplify: 8:4:12

    Answer: 2:1:3
  5. 5. Statistics

    A bag has 3 red and 7 blue balls. What is the probability of picking a red ball?

    Answer: 3⁄10

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