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Cornerstone · Grades 3–5 Keystones #1 23 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 23 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 1⁄7

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

    Solve: 8x - 14 = 82

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 8cm and b = 10cm

    Answer: 12.81cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 6, 18, 36, 17, 29, 9

    Answer: 19.2

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