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Cornerstone · Grades 3–5 Keystones #1 18 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄10 + 7⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 5x - 17 = 23

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 11, 21, 7, 26, 48, 6, 6, 11

    Answer: 17

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