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Cornerstone · Grades 3–5 Keystones #247 4 September 2026 Skills week 1 of 7
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Five GCSE retrieval questions · 4 September 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄6 + 3⁄6

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

    Solve: 6x - 10 = 50

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 6cm and b = 11cm

    Answer: 12.53cm
  4. 4. Ratio Sharing in a ratio

    Share 39 in the ratio 2:1

    Answer: 26 and 13
  5. 5. Statistics Mean

    Calculate the mean of: 8, 36, 15, 36, 39, 34, 21

    Answer: 27

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