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Cornerstone · Grades 3–5 Keystones #194 13 July 2026 Skills week 1 of 7
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Five GCSE retrieval questions · 13 July 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 3⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 2x - 15 = 5

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

    Calculate the hypotenuse when a = 7cm and b = 13cm

    Answer: 14.76cm
  4. 4. Ratio Sharing in a ratio

    Divide 160 in the ratio 1:3:4

    Answer: 20, 60 and 80
  5. 5. Statistics Mean

    Find the mean of: 17, 17, 19, 12, 10

    Answer: 15

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