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Cornerstone · Grades 3–5 Keystones #1 8 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄5

    Answer: 22⁄15
  2. 2. Algebra Two-step equations

    Solve: 4x + 6 = 18

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

    Calculate the hypotenuse when a = 4cm and b = 12cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:2

    Answer: 42 and 28
  5. 5. Statistics Mean

    Find the mean of: 4, 11, 19, 17, 8

    Answer: 11.8

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