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

Five GCSE retrieval questions · 1 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄11 + 2⁄11

    Answer: 3⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 12 = 24

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

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 4:1

    Answer: 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 13, 14, 28, 19, 44, 18, 14, 16

    Answer: 20.8

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