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Cornerstone · Grades 3–5 Keystones #1 25 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 25 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 4⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 11 = 21

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 1:4:2

    Answer: 23, 92 and 46
  5. 5. Statistics Mean

    Calculate the mean of: 35, 30, 33, 40, 8, 42

    Answer: 31.3

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