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Cornerstone · Grades 3–5 Keystones #1 22 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 3⁄4

    Answer: 31⁄20
  2. 2. Algebra Two-step equations

    Solve: 4x + 10 = 46

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

    Calculate the hypotenuse when a = 6cm and b = 15cm

    Answer: 16.16cm
  4. 4. Ratio Sharing in a ratio

    Share 66 in the ratio 1:2

    Answer: 22 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 15, 18, 11, 15, 15, 27

    Answer: 16.8

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