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Cornerstone · Grades 3–5 Keystones #1 9 July 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 9 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄9 + 1⁄9

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

    Solve: 3x - 13 = 26

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 11, 18, 28, 17, 21, 25, 38, 13

    Answer: 21.4

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