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Cornerstone · Grades 3–5 Keystones #1 6 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 6 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄5 + 1⁄4

    Answer: 9⁄20
  2. 2. Algebra Two-step equations

    Solve: 7x - 11 = 73

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

    Find the hypotenuse of a right triangle with sides 5cm and 12cm

    Answer: 13cm
  4. 4. Ratio Sharing in a ratio

    Divide 161 in the ratio 4:1:2

    Answer: 92, 23 and 46
  5. 5. Statistics Mean

    Calculate the mean of: 31, 29, 16, 37, 24, 30. Give your answer to 2 decimal places

    Answer: 27.83

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