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Cornerstone · Grades 3–5 Keystones #1 13 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 13 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 1⁄4

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

    Solve: 8x - 19 = 13

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

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Divide 96 in the ratio 1:1:2

    Answer: 24, 24 and 48
  5. 5. Statistics Mean

    Find the mean of: 5, 15, 18

    Answer: 12.666666666667

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