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Cornerstone · Grades 3–5 Keystones #1 10 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄4 + 1⁄8

    Answer: 5⁄8
  2. 2. Algebra Two-step equations

    Solve: 7x - 12 = 65

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

    Calculate the hypotenuse when a = 5cm and b = 15cm

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Share 50 in the ratio 4:1

    Answer: 40 and 10
  5. 5. Statistics Mean

    Calculate the mean of: 43, 35, 43, 43, 21, 17

    Answer: 33.7

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