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Cornerstone · Grades 3–5 Keystones #1 29 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 29 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 3⁄6

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 7x - 5 = 37

    Answer: x = 6
  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 126 in the ratio 4:1:4

    Answer: 56, 14 and 56
  5. 5. Statistics Mean

    Calculate the mean of: 42, 5, 23, 41, 24, 49, 9, 13

    Answer: 25.8

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