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Cornerstone · Grades 3–5 Keystones #1 19 November 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 November 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄4 + 3⁄6

    Answer: 3⁄4
  2. 2. Algebra Two-step equations

    Solve: 6x + 9 = 81

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 6cm

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

    Share 27 in the ratio 2:1

    Answer: 18 and 9
  5. 5. Statistics Mean

    Find the mean of: 13, 19, 5

    Answer: 12.333333333333

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