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Cornerstone · Grades 3–5 Keystones #1 25 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 25 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄8 + 1⁄4

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 22

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

    Calculate the hypotenuse when a = 10cm and b = 12cm

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Divide 135 in the ratio 3:2:4

    Answer: 45, 30 and 60
  5. 5. Statistics Mean

    Find the mean of: 8, 11, 8

    Answer: 9

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