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Cornerstone · Grades 3–5 Keystones #1 30 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 4⁄6

    Answer: 4⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x - 17 = -9

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 1:1:2

    Answer: 54, 54 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 34, 11, 44, 25, 29, 37, 24, 8

    Answer: 26.5

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