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Cornerstone · Grades 3–5 Keystones #1 30 October 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 30 October 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 4⁄8

    Answer: 13⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x + 14 = 34

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 4:1

    Answer: 68 and 17
  5. 5. Statistics Mean

    Calculate the mean of: 24, 12, 21, 23, 44, 41, 21

    Answer: 26.6

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