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Cornerstone · Grades 3–5 Keystones #1 15 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 15 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 57 + 17

    Answer: 67
  2. 2. Algebra Two-step equations

    Solve: 6x + 15 = 63

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 52 in the ratio 3:1

    Answer: 39 and 13
  5. 5. Statistics Mean

    Find the mean of: 3, 2, 15, 10, 17

    Answer: 9.4