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

Five GCSE retrieval questions · 7 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 24 + 47

    Answer: 1514
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 51

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

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 2:1

    Answer: 14 and 7
  5. 5. Statistics Mean

    Find the mean of: 17, 7, 6, 6, 19

    Answer: 11