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Cornerstone · Grades 3–5 Keystones #148 28 May 2026 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2026 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 2⁄7

    Answer: 17⁄35
  2. 2. Algebra Two-step equations

    Solve: 7x - 8 = 20

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 9cm

    Answer: 12.73cm
  4. 4. Ratio Sharing in a ratio

    Divide 297 in the ratio 3:4:4

    Answer: 81, 108 and 108
  5. 5. Statistics Mean

    Find the mean of: 12, 5, 19

    Answer: 12

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