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Cornerstone · Grades 3–5 Keystones #245 2 September 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 2 September 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 2⁄3

    Answer: 7⁄6
  2. 2. Algebra Two-step equations

    Solve: 6x + 12 = 84

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 7cm and 24cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Divide 168 in the ratio 2:1:1

    Answer: 84, 42 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 17, 47, 44, 21, 29, 40, 32, 14

    Answer: 30.5

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