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Cornerstone · Grades 3–5 Keystones #1 22 December 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 22 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄11 + 4⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 8x - 18 = 70

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 6cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 104 in the ratio 1:1:2

    Answer: 26, 26 and 52
  5. 5. Statistics Mean

    Find the mean of: 13, 19, 12

    Answer: 14.666666666667

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