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Cornerstone · Grades 3–5 Keystones #1 30 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 30 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 5⁄7 + 1⁄7

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

    Solve: 7x - 17 = 74

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 5cm

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Share 36 in the ratio 3:1

    Answer: 27 and 9
  5. 5. Statistics Mean

    Find the mean of: 2, 10, 3, 11

    Answer: 6.5

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