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Cornerstone · Grades 3–5 Keystones #53 22 February 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 22 February 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄6 + 1⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 67

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 14cm

    Answer: 17.8cm
  4. 4. Ratio Sharing in a ratio

    Share 27 in the ratio 1:2

    Answer: 9 and 18
  5. 5. Statistics Mean

    Calculate the mean of: 10, 10, 25, 45, 39, 7, 45

    Answer: 25.9

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