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Cornerstone · Grades 3–5 Keystones #1 14 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 6⁄7

    Answer: 71⁄42
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 55

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 15cm

    Answer: 18.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 48 in the ratio 1:2:1

    Answer: 12, 24 and 12
  5. 5. Statistics Mean

    Find the mean of: 5, 4, 5

    Answer: 4.6666666666667

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