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Cornerstone · Grades 3–5 Keystones #1 6 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 6 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 1⁄7

    Answer: 13⁄42
  2. 2. Algebra Two-step equations

    Solve: 8x - 11 = 69

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 6cm

    Answer: 9.22cm
  4. 4. Ratio Sharing in a ratio

    Share 100 in the ratio 2:3

    Answer: 40 and 60
  5. 5. Statistics Mean

    Find the mean of: 17, 13, 9, 18

    Answer: 14.25

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