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Cornerstone · Grades 3–5 Keystones #1 11 February 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 11 February 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 8⁄10 + 1⁄10

    Answer: 9⁄10
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 39

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 6cm

    Answer: 6.71cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 3:1

    Answer: 18 and 6
  5. 5. Statistics Mean

    Calculate the mean of: 44, 26, 14, 36, 33, 35, 42, 23

    Answer: 31.6

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