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Cornerstone · Grades 3–5 Keystones #48 17 February 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 17 February 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

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

    Solve: 2x - 13 = -1

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 7cm

    Answer: 9.9cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 3:2

    Answer: 51 and 34
  5. 5. Statistics Mean

    Find the mean of: 7, 14, 5, 4

    Answer: 7.5

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