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Cornerstone · Grades 3–5 Keystones #145 25 May 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 May 2026 · mathsvault.uk/keystones

  1. 1. Number

    Calculate: 214 + 529

    Answer: 214 + 529 = 743
  2. 2. Algebra

    Factorise: 12x + 16

    Answer: 2(6x + 8)
  3. 3. Geometry

    Opposite = 8cm, adjacent = 9cm. Calculate the angle

    Answer: 41.6°
  4. 4. Ratio

    Calculate 25% of 196

    Answer: 49
  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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