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Cornerstone · Grades 3–5 Keystones #1 18 August 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 August 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄5 + 5⁄6

    Answer: 37⁄30
  2. 2. Algebra Two-step equations

    Solve: 7x - 10 = 60

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

    Calculate the hypotenuse when a = 4cm and b = 13cm

    Answer: 13.6cm
  4. 4. Ratio Sharing in a ratio

    Divide 145 in the ratio 1:2:2

    Answer: 29, 58 and 58
  5. 5. Statistics Mean

    Find the mean of: 16, 2, 18

    Answer: 12

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