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Cornerstone · Grades 3–5 Keystones #1 15 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x - 7 = 11

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 12cm

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Share 20 in the ratio 1:3

    Answer: 5 and 15
  5. 5. Statistics Mean

    Calculate the mean of: 37, 31, 20, 41, 9, 49

    Answer: 31.2

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