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Cornerstone · Grades 3–5 Keystones #1 30 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄7 + 4⁄8

    Answer: 13⁄14
  2. 2. Algebra Two-step equations

    Solve: 2x + 15 = 35

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 21 in the ratio 1:2

    Answer: 7 and 14
  5. 5. Statistics Mean

    Find the mean of: 13, 13, 5

    Answer: 10.333333333333

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