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Cornerstone · Grades 3–5 Keystones #1 19 January 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 19 January 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄6 + 4⁄6

    Answer: 5⁄6
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 51

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

    Find the hypotenuse of a right triangle with sides 20cm and 21cm

    Answer: 29cm
  4. 4. Ratio Sharing in a ratio

    Share 95 in the ratio 1:4

    Answer: 19 and 76
  5. 5. Statistics Mean

    Find the mean of: 3, 14, 9, 18, 4

    Answer: 9.6

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