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Cornerstone · Grades 3–5 Keystones #1 6 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄6

    Answer: 1⁄1
  2. 2. Algebra Two-step equations

    Solve: 7x + 4 = 88

    Answer: x = 12
  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

    Divide 125 in the ratio 2:1:2

    Answer: 50, 25 and 50
  5. 5. Statistics Mean

    Calculate the mean of: 38, 36, 18, 9, 5, 18, 40

    Answer: 23.4

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