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Cornerstone · Grades 3–5 Keystones #1 14 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 1⁄3

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x - 10 = 16

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 9cm

    Answer: 12.04cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:2

    Answer: 42 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 21, 39, 12, 17, 26, 11, 11

    Answer: 19.6

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