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Cornerstone · Grades 3–5 Keystones #149 29 May 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 May 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 2⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 2x + 9 = 27

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 216 in the ratio 1:1:2

    Answer: 54, 54 and 108
  5. 5. Statistics Mean

    Calculate the mean of: 9, 44, 28, 36, 41, 32, 10

    Answer: 28.6

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