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Cornerstone · Grades 3–5 Keystones #1 12 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 12 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄12 + 4⁄12

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

    Solve: 3x + 8 = 23

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 4cm

    Answer: 12.65cm
  4. 4. Ratio Sharing in a ratio

    Share 66 in the ratio 2:1

    Answer: 44 and 22
  5. 5. Statistics Mean

    Find the mean of: 18, 20, 16

    Answer: 18

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