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Cornerstone · Grades 3–5 Keystones #1 19 December 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 19 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 4⁄7

    Answer: 15⁄14
  2. 2. Algebra Two-step equations

    Solve: 7x + 10 = 66

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

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 95 in the ratio 1:1:3

    Answer: 19, 19 and 57
  5. 5. Statistics Mean

    Find the mean of: 6, 19, 4

    Answer: 9.6666666666667

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