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Cornerstone · Grades 3–5 Keystones #1 4 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 4 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄11 + 1⁄11

    Answer: 9⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x + 5 = 17

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

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 147 in the ratio 3:1:3

    Answer: 63, 21 and 63
  5. 5. Statistics Mean

    Calculate the mean of: 13, 45, 14, 35, 46, 46

    Answer: 33.2

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