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Cornerstone · Grades 3–5 Keystones #1 2 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 1⁄3

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 64

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 1:2

    Answer: 7 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 13, 47, 18, 25, 37, 27, 49

    Answer: 30.9

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