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Cornerstone · Grades 3–5 Keystones #1 28 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 2⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 4x + 8 = 56

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

    Calculate the hypotenuse when a = 11cm and b = 12cm

    Answer: 16.28cm
  4. 4. Ratio Sharing in a ratio

    Share 119 in the ratio 3:4

    Answer: 51 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 22, 36, 27, 41, 27, 47, 50, 42

    Answer: 36.5

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