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Cornerstone · Grades 3–5 Keystones #1 2 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

    Answer: 6⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 11 = 49

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Divide 100 in the ratio 3:1:1

    Answer: 60, 20 and 20
  5. 5. Statistics Mean

    Find the mean of: 9, 15, 17

    Answer: 13.666666666667

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