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

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

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄3

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 6x + 4 = 40

    Answer: x = 6
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 11cm and b = 8cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Share 45 in the ratio 1:4

    Answer: 9 and 36
  5. 5. Statistics Mean

    Find the mean of: 8, 19, 18, 3, 4

    Answer: 10.4

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