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Cornerstone · Grades 3–5 Keystones #146 26 May 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 26 May 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 3⁄6 + 1⁄6

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 3x + 3 = 30

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 2:4:1

    Answer: 24, 48 and 12
  5. 5. Statistics Mean

    Calculate the mean of: 11, 15, 23, 12, 14, 43, 38, 47

    Answer: 25.4

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