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Cornerstone · Grades 3–5 Keystones #1 16 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 5⁄8

    Answer: 51⁄56
  2. 2. Algebra Two-step equations

    Solve: 2x + 11 = 19

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 10cm

    Answer: 10.44cm
  4. 4. Ratio Sharing in a ratio

    Share 68 in the ratio 1:3

    Answer: 17 and 51
  5. 5. Statistics Mean

    Find the mean of: 16, 4, 14, 10

    Answer: 11

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