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Cornerstone · Grades 3–5 Keystones #1 29 December 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 29 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 2⁄5

    Answer: 23⁄20
  2. 2. Algebra Two-step equations

    Solve: 6x - 14 = 34

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 2:3

    Answer: 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 26, 32, 15, 43, 35, 23

    Answer: 29

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