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Cornerstone · Grades 3–5 Keystones #1 10 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 10 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 39

    Answer: x = 7
  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 250 in the ratio 1:2:2

    Answer: 50, 100 and 100
  5. 5. Statistics Mean

    Find the mean of: 10, 16, 12, 18, 11

    Answer: 13.4

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