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Cornerstone · Grades 3–5 Keystones #1 24 April 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄3 + 2⁄4

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

    Solve: 2x + 11 = 31

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

    Calculate the hypotenuse when a = 6cm and b = 9cm

    Answer: 10.82cm
  4. 4. Ratio Sharing in a ratio

    Divide 105 in the ratio 2:2:3

    Answer: 30, 30 and 45
  5. 5. Statistics Mean

    Calculate the mean of: 31, 34, 42, 25, 33, 42, 15, 20

    Answer: 30.3

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