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

Five GCSE retrieval questions · 7 September 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄11 + 2⁄11

    Answer: 7⁄11
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 0

    Answer: x = 5
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 4cm

    Answer: 8.94cm
  4. 4. Ratio Sharing in a ratio

    Divide 102 in the ratio 1:4:1

    Answer: 17, 68 and 17
  5. 5. Statistics Mean

    Find the mean of: 4, 19, 12, 3, 6

    Answer: 8.8

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