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Cornerstone · Grades 3–5 Keystones #1 20 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 20 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 5⁄8

    Answer: 59⁄56
  2. 2. Algebra Two-step equations

    Solve: 5x - 5 = 35

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

    Calculate the hypotenuse when a = 4cm and b = 5cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 2:3

    Answer: 40 and 60
  5. 5. Statistics Mean

    Find the mean of: 14, 11, 2, 19

    Answer: 11.5

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