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Cornerstone · Grades 3–5 Keystones #1 18 January 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 18 January 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 4⁄12

    Answer: 1⁄2
  2. 2. Algebra Two-step equations

    Solve: 4x - 19 = 41

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 15.81cm
  4. 4. Ratio Sharing in a ratio

    Divide 66 in the ratio 1:2:3

    Answer: 11, 22 and 33
  5. 5. Statistics Mean

    Calculate the mean of: 28, 41, 6, 45, 33, 12

    Answer: 27.5

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