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Cornerstone · Grades 3–5 Keystones #2 2 January 2026
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 January 2026 · mathsvault.uk/keystones

  1. 1. Number

    450000

    Answer: 4.5 × 105
  2. 2. Algebra

    What is the next term? 4, 16, 64, 256, ...

    Answer: 1024
  3. 3. Geometry

    Find the perimeter of a right triangle with sides 6cm, 8cm, 10cm

    Answer: 24cm
  4. 4. Ratio

    Calculate 25% of 94

    Answer: 23.5
  5. 5. Statistics

    Find the mean of: 11, 10, 5, 12, 7

    Answer: 9

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