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

Five GCSE retrieval questions · 5 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄11 + 2⁄11

    Answer: 8⁄11
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 51

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 8cm

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Divide 230 in the ratio 4:3:3

    Answer: 92, 69 and 69
  5. 5. Statistics Mean

    Calculate the mean of: 46, 21, 40, 35, 43, 49

    Answer: 39

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