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

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

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄3

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

    Solve: 2x - 15 = 5

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 3:4

    Answer: 18 and 24
  5. 5. Statistics Mean

    Calculate the mean of: 44, 39, 43, 12, 15, 23, 35

    Answer: 30.1

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