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Cornerstone · Grades 3–5 Keystones #1 27 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 27 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄12 + 4⁄12

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

    Solve: 8x - 17 = 39

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

    Calculate the hypotenuse when a = 9cm and b = 5cm. Give your answer to 2 decimal places

    Answer: 10.3cm
  4. 4. Ratio Sharing in a ratio

    Share 42 in the ratio 1:2

    Answer: 14 and 28
  5. 5. Statistics Mean

    Calculate the mean of: 36, 31, 12, 25, 34, 23. Give your answer to 2 decimal places

    Answer: 26.83

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