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Cornerstone · Grades 3–5 Keystones #1 15 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 4⁄8

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 7x - 14 = 70

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 14cm

    Answer: 16.12cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 1:3

    Answer: 13 and 39
  5. 5. Statistics Mean

    Calculate the mean of: 16, 32, 39, 10, 45, 25, 19, 38

    Answer: 28

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