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Cornerstone · Grades 3–5 Keystones #147 27 May 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 May 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 6⁄7 + 3⁄5

    Answer: 51⁄35
  2. 2. Algebra Two-step equations

    Solve: 3x - 16 = 14

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

    Calculate the hypotenuse when a = 11cm and b = 9cm

    Answer: 14.21cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 3:1:4

    Answer: 30, 10 and 40
  5. 5. Statistics Mean

    Find the mean of: 8, 12, 20, 19, 8

    Answer: 13.4

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