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Cornerstone · Grades 3–5 Keystones #1 11 September 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x - 12 = 21

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

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Divide 184 in the ratio 1:1:2

    Answer: 46, 46 and 92
  5. 5. Statistics Mean

    Find the mean of: 8, 7, 10

    Answer: 8.3333333333333

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