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Cornerstone · Grades 3–5 Keystones #49 18 February 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 February 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 6x - 18 = 6

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 14cm

    Answer: 18.44cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 1:3

    Answer: 6 and 18
  5. 5. Statistics Mean

    Find the mean of: 6, 9, 6, 7

    Answer: 7

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