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

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

  1. 1. Number Adding fractions

    Add: 2⁄5 + 4⁄7

    Answer: 34⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 17 = 81

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 3cm and b = 8cm

    Answer: 8.54cm
  4. 4. Ratio Sharing in a ratio

    Divide 156 in the ratio 2:1:3

    Answer: 52, 26 and 78
  5. 5. Statistics Mean

    Calculate the mean of: 46, 22, 36, 28, 40, 18, 7, 50

    Answer: 30.9

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