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Cornerstone · Grades 3–5 Keystones #1 11 October 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 4⁄6

    Answer: 32⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 48

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 12cm

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

    Share 63 in the ratio 3:4

    Answer: 27 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 29, 12, 31, 29, 14, 7, 16, 19

    Answer: 19.6

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