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Cornerstone · Grades 3–5 Keystones #195 14 July 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 14 July 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 610 + 210

    Answer: 45
  2. 2. Algebra Two-step equations

    Solve: 3x - 5 = 25

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

    Calculate the hypotenuse when a = 10cm and b = 5cm

    Answer: 11.18cm
  4. 4. Ratio Sharing in a ratio

    Share 80 in the ratio 3:2

    Answer: 48 and 32
  5. 5. Statistics Mean

    Calculate the mean of: 38, 10, 18, 40, 29, 10, 19, 49

    Answer: 26.6