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Cornerstone · Grades 3–5 Keystones #1 24 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 24 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 4⁄8

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 30

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 208 in the ratio 1:1:2

    Answer: 52, 52 and 104
  5. 5. Statistics Mean

    Find the mean of: 3, 16, 14, 18, 9

    Answer: 12

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