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Cornerstone · Grades 3–5 Keystones #199 18 July 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 18 July 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄3 + 1⁄5

    Answer: 13⁄15
  2. 2. Algebra Two-step equations

    Solve: 5x - 14 = 46

    Answer: x = 12
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Share 114 in the ratio 2:1

    Answer: 76 and 38
  5. 5. Statistics Mean

    Calculate the mean of: 22, 21, 42, 8, 30, 47, 29, 47

    Answer: 30.8

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