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Cornerstone · Grades 3–5 Keystones #1 27 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 3⁄4

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

    Solve: 2x + 15 = 21

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

    Calculate the hypotenuse when a = 4cm and b = 10cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:4

    Answer: 8 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 21, 42, 38, 44, 34, 42, 10, 33

    Answer: 33

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