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Cornerstone · Grades 3–5 Keystones #1 15 June 2024
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 June 2024 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 255 + 388

    Answer: 255 + 388 = 643
  2. 2. Algebra

    Factorise: 4x² + 2x

    Answer: 2x(2x + 1)
  3. 3. Geometry

    Opposite = 11cm, adjacent = 17cm. Calculate the angle

    Answer: 32.9°
  4. 4. Ratio

    Simplify: 4:10:6

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

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

    Answer: 1⁄2

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