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

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

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 20 = 7

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

    Calculate the hypotenuse when a = 8cm and b = 4cm

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 1:2

    Answer: 8 and 16
  5. 5. Statistics Mean

    Find the mean of: 16, 18, 6, 5

    Answer: 11.25

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