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Cornerstone · Grades 3–5 Keystones #1 22 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 2⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 5x + 6 = 51

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 9cm

    Answer: 9.85cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 4:1

    Answer: 28 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 14, 21, 21, 22, 15, 14, 32

    Answer: 19.9

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