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Cornerstone · Grades 3–5 Keystones #1 4 October 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄8 + 2⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 5x - 9 = 36

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

    Calculate the hypotenuse when a = 3cm and b = 13cm

    Answer: 13.34cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics Mean

    Calculate the mean of: 40, 20, 31, 22, 6, 14

    Answer: 22.2

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