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Cornerstone · Grades 3–5 Keystones #47 16 February 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 February 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 4⁄8

    Answer: 7⁄10
  2. 2. Algebra Two-step equations

    Solve: 6x + 3 = 33

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 108 in the ratio 1:2

    Answer: 36 and 72
  5. 5. Statistics Mean

    Calculate the mean of: 48, 15, 20, 18, 26, 39

    Answer: 27.7

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