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Cornerstone · Grades 3–5 Keystones #1 10 May 2025 Skills week 1 of 7
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Keystones — Cornerstone

Five GCSE retrieval questions · 10 May 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 1⁄7

    Answer: 2⁄7
  2. 2. Algebra Two-step equations

    Solve: 4x + 9 = 45

    Answer: x = 9
  3. 3. Geometry Pythagoras — hypotenuse

    Find the hypotenuse of a right triangle with sides 15cm and 20cm

    Answer: 25cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 3:4

    Answer: 45 and 60
  5. 5. Statistics Mean

    Calculate the mean of: 46, 21, 49, 29, 44, 5, 9, 22

    Answer: 28.1

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