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Cornerstone · Grades 3–5 Keystones #243 31 August 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄7 + 3⁄7

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

    Solve: 3x + 11 = 29

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 10cm

    Answer: 10.77cm
  4. 4. Ratio Sharing in a ratio

    Divide 144 in the ratio 1:3:4

    Answer: 18, 54 and 72
  5. 5. Statistics Mean

    Find the mean of: 5, 12, 16, 18

    Answer: 12.75

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