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Cornerstone · Grades 3–5 Keystones #1 6 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 6⁄8

    Answer: 13⁄12
  2. 2. Algebra Two-step equations

    Solve: 6x - 7 = 41

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

    Calculate the hypotenuse when a = 3cm and b = 7cm

    Answer: 7.62cm
  4. 4. Ratio Sharing in a ratio

    Share 77 in the ratio 3:4

    Answer: 33 and 44
  5. 5. Statistics Mean

    Calculate the mean of: 18, 9, 39, 9, 15, 9

    Answer: 16.5

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