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Cornerstone · Grades 3–5 Keystones #1 10 July 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 10 July 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 1⁄3

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

    Solve: 4x - 18 = 30

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

    Find the hypotenuse of a right triangle with sides 12cm and 16cm

    Answer: 20cm
  4. 4. Ratio Sharing in a ratio

    Share 76 in the ratio 1:3

    Answer: 19 and 57
  5. 5. Statistics Mean

    Find the mean of: 12, 5, 17, 22

    Answer: 14

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