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Cornerstone · Grades 3–5 Keystones #1 11 July 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 July 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄8 + 4⁄6

    Answer: 25⁄24
  2. 2. Algebra Two-step equations

    Solve: 7x + 11 = 74

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

    Find the hypotenuse of a right triangle with sides 15cm and 36cm

    Answer: 39cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:2

    Answer: 48 and 32
  5. 5. Statistics Mean

    Find the mean of: 14, 20, 20, 8, 3

    Answer: 13

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