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Cornerstone · Grades 3–5 Keystones #1 31 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 31 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄5 + 5⁄6

    Answer: 49⁄30
  2. 2. Algebra Two-step equations

    Solve: 5x + 5 = 60

    Answer: x = 11
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 4:1

    Answer: 56 and 14
  5. 5. Statistics Mean

    Calculate the mean of: 7, 11, 21, 34, 22, 19

    Answer: 19

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