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Cornerstone · Grades 3–5 Keystones #1 4 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 1⁄3

    Answer: 25⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 8 = 58

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 1:3

    Answer: 9 and 27
  5. 5. Statistics Mean

    Find the mean of: 3, 15, 12

    Answer: 10

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