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Cornerstone · Grades 3–5 Keystones #1 11 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄7 + 2⁄5

    Answer: 34⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x - 18 = 9

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 138 in the ratio 2:1:3

    Answer: 46, 23 and 69
  5. 5. Statistics Mean

    Find the mean of: 8, 9, 16

    Answer: 11

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