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Cornerstone · Grades 3–5 Keystones #1 18 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 2⁄8

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x + 6 = 54

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

    Calculate the hypotenuse when a = 12cm and b = 15cm

    Answer: 19.21cm
  4. 4. Ratio Sharing in a ratio

    Share 75 in the ratio 4:1

    Answer: 60 and 15
  5. 5. Statistics Mean

    Find the mean of: 17, 16, 14, 13

    Answer: 15

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