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Cornerstone · Grades 3–5 Keystones #1 1 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 1 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 3⁄4

    Answer: 5⁄4
  2. 2. Algebra Two-step equations

    Solve: 2x - 18 = 12

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

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

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

    Divide 180 in the ratio 1:2:3

    Answer: 30, 60 and 90
  5. 5. Statistics Mean

    Find the mean of: 14, 20, 6

    Answer: 13.333333333333

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