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Cornerstone · Grades 3–5 Keystones #1 6 November 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 6 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄9 + 2⁄9

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

    Solve: 2x - 7 = 17

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 8cm

    Answer: 8.54cm
  4. 4. Ratio Sharing in a ratio

    Divide 270 in the ratio 3:3:4

    Answer: 81, 81 and 108
  5. 5. Statistics Mean

    Find the mean of: 10, 11, 17, 7

    Answer: 11.25

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