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Cornerstone · Grades 3–5 Keystones #1 8 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 8 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄10 + 1⁄10

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x - 10 = 32

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

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

    Answer: 8.49cm
  4. 4. Ratio Sharing in a ratio

    Divide 140 in the ratio 4:3:3

    Answer: 56, 42 and 42
  5. 5. Statistics Mean

    Find the mean of: 14, 6, 5, 16, 9

    Answer: 10

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