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Cornerstone · Grades 3–5 Keystones #1 30 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 30 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 2⁄3

    Answer: 17⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x - 7 = 28

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

    Find the hypotenuse of a right triangle with sides 3cm and 4cm

    Answer: 5cm
  4. 4. Ratio Sharing in a ratio

    Share 102 in the ratio 1:2

    Answer: 34 and 68
  5. 5. Statistics Mean

    Calculate the mean of: 47, 17, 49, 24, 19, 38, 7. Give your answer to 2 decimal places

    Answer: 28.71

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