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Cornerstone · Grades 3–5 Keystones #198 17 July 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 July 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 5⁄6

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

    Solve: 8x - 7 = 73

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Share 25 in the ratio 3:2

    Answer: 15 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 9, 17, 11, 13, 11, 33

    Answer: 15.7

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