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Cornerstone · Grades 3–5 Keystones #1 18 December 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 December 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 2⁄6

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

    Solve: 7x - 6 = 71

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

    Calculate the hypotenuse when a = 5cm and b = 4cm

    Answer: 6.4cm
  4. 4. Ratio Sharing in a ratio

    Divide 132 in the ratio 2:1:3

    Answer: 44, 22 and 66
  5. 5. Statistics Mean

    Calculate the mean of: 16, 26, 15, 22, 26, 16

    Answer: 20.2

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