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Cornerstone · Grades 3–5 Keystones #1 13 October 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 13 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄7 + 4⁄5

    Answer: 53⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 49

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 11cm

    Answer: 13.04cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 2:3

    Answer: 32 and 48
  5. 5. Statistics Mean

    Find the mean of: 16, 5, 9, 9, 11

    Answer: 10

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