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Cornerstone · Grades 3–5 Keystones #1 3 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 3 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄8 + 3⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x + 7 = 27

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 12cm

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:2

    Answer: 15 and 30
  5. 5. Statistics Mean

    Find the mean of: 4, 2, 8

    Answer: 4.6666666666667

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