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Cornerstone · Grades 3–5 Keystones #1 4 December 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 4 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 2x + 13 = 35

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 6cm and 8cm

    Answer: 10cm
  4. 4. Ratio Sharing in a ratio

    Share 60 in the ratio 2:3

    Answer: 24 and 36
  5. 5. Statistics Mean

    Calculate the mean of: 17, 13, 6, 39, 32, 12, 9, 43

    Answer: 21.4

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