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Cornerstone · Grades 3–5 Keystones #1 15 April 2025 Skills week 1 of 7
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Five GCSE retrieval questions · 15 April 2025 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 2⁄5

    Answer: 3⁄5
  2. 2. Algebra Two-step equations

    Solve: 7x + 14 = 77

    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 25 in the ratio 4:1

    Answer: 20 and 5
  5. 5. Statistics Mean

    Calculate the mean of: 6, 43, 22, 6, 23, 26, 27

    Answer: 21.9

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