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Cornerstone · Grades 3–5 Keystones #1 25 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 2⁄3

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 2x - 6 = 8

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

    Calculate the hypotenuse when a = 12cm and b = 7cm

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 63 in the ratio 4:3

    Answer: 36 and 27
  5. 5. Statistics Mean

    Find the mean of: 15, 8, 19, 17

    Answer: 14.75

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