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Cornerstone · Grades 3–5 Keystones #263 20 September 2026 Skills week 3 of 7
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Five GCSE retrieval questions · 20 September 2026 · mathsvault.uk/keystones

  1. 1. Number Multiplying fractions

    Multiply: 5⁄6 × 5⁄4

    Answer: 25⁄24
  2. 2. Algebra Expanding single brackets

    Expand: 5(6x + 5)

    Answer: 30x + 25
  3. 3. Geometry Pythagoras — short side

    Find b if a = 9cm and c = 20cm

    Answer: 17.86cm
  4. 4. Ratio Ratio given the difference

    In ratio 5:1, the difference between shares is 92. What are the shares?

    Answer: 115 and 23
  5. 5. Statistics Range

    Calculate the range of: 72, 46, 45, 50, 37, 51

    Answer: 35

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