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Cornerstone · Grades 3–5 Keystones #1 27 March 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 27 March 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄8 + 5⁄7

    Answer: 75⁄56
  2. 2. Algebra Two-step equations

    Solve: 2x - 8 = 18

    Answer: x = 13
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 9cm and 12cm

    Answer: 15cm
  4. 4. Ratio Sharing in a ratio

    Divide 80 in the ratio 2:3:3

    Answer: 20, 30 and 30
  5. 5. Statistics Mean

    Find the mean of: 9, 3, 11, 6, 8

    Answer: 7.4

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