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Cornerstone · Grades 3–5 Keystones #1 28 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 28 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 6⁄9 + 2⁄9

    Answer: 8⁄9
  2. 2. Algebra Two-step equations

    Solve: 6x - 8 = 34

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 8cm and 15cm

    Answer: 17cm
  4. 4. Ratio Sharing in a ratio

    Share 51 in the ratio 1:2

    Answer: 17 and 34
  5. 5. Statistics Mean

    Calculate the mean of: 9, 8, 46, 42, 33, 15

    Answer: 25.5

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