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Cornerstone · Grades 3–5 Keystones #1 16 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 16 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 1⁄6

    Answer: 1⁄3
  2. 2. Algebra Two-step equations

    Solve: 8x - 7 = 65

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 6cm

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 1:3

    Answer: 20 and 60
  5. 5. Statistics Mean

    Find the mean of: 3, 7, 15

    Answer: 8.3333333333333

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