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Cornerstone · Grades 3–5 Keystones #1 26 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄9 + 2⁄9

    Answer: 7⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x - 20 = 8

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 12cm and 35cm

    Answer: 37cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 3:2

    Answer: 60 and 40
  5. 5. Statistics Mean

    Find the mean of: 2, 12, 11, 13

    Answer: 9.5

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