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

Five GCSE retrieval questions · 7 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 3⁄6

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

    Solve: 6x + 7 = 67

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

    Calculate the hypotenuse when a = 11cm and b = 11cm

    Answer: 15.56cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 3:2

    Answer: 36 and 24
  5. 5. Statistics Mean

    Find the mean of: 16, 12, 17, 13

    Answer: 14.5

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