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Cornerstone · Grades 3–5 Keystones #1 27 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 27 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄10 + 5⁄10

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 5x + 13 = 58

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Divide 126 in the ratio 1:3:3

    Answer: 18, 54 and 54
  5. 5. Statistics Mean

    Find the mean of: 10, 16, 16, 14, 13

    Answer: 13.8

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