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Cornerstone · Grades 3–5 Keystones #1 24 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 24 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 2x + 12 = 30

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

    Calculate the hypotenuse when a = 10cm and b = 14cm

    Answer: 17.2cm
  4. 4. Ratio Sharing in a ratio

    Share 70 in the ratio 3:4

    Answer: 30 and 40
  5. 5. Statistics Mean

    Find the mean of: 10, 17, 17, 12

    Answer: 14

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