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Cornerstone · Grades 3–5 Keystones #1 28 June 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 June 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 3⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 25

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 5cm

    Answer: 12.08cm
  4. 4. Ratio Sharing in a ratio

    Divide 162 in the ratio 4:2:3

    Answer: 72, 36 and 54
  5. 5. Statistics Mean

    Calculate the mean of: 10, 13, 22, 20, 18, 27

    Answer: 18.3

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