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Cornerstone · Grades 3–5 Keystones #1 11 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 4⁄8

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

    Solve: 7x - 18 = 73

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 15cm

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 55 in the ratio 3:2

    Answer: 33 and 22
  5. 5. Statistics Mean

    Find the mean of: 7, 20, 13, 16, 17

    Answer: 14.6

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