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Cornerstone · Grades 3–5 Keystones #1 25 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 25 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄7 + 3⁄7

    Answer: 4⁄7
  2. 2. Algebra Two-step equations

    Solve: 3x + 15 = 27

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 10cm. Give your answer to 2 decimal places

    Answer: 15.62cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 2:3

    Answer: 16 and 24
  5. 5. Statistics Mean

    Find the mean of: 16, 16, 7

    Answer: 13

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