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Cornerstone · Grades 3–5 Keystones #99 9 April 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 9 April 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄4 + 1⁄6

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 33

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 15cm

    Answer: 15.52cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 2:3

    Answer: 28 and 42
  5. 5. Statistics Mean

    Find the mean of: 5, 19, 20

    Answer: 14.666666666667

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