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Cornerstone · Grades 3–5 Keystones #1 29 October 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 3⁄8

    Answer: 53⁄56
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 24

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 11cm

    Answer: 11.7cm
  4. 4. Ratio Sharing in a ratio

    Share 54 in the ratio 2:1

    Answer: 36 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 17, 29, 31, 28, 6, 35, 35

    Answer: 25.9

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