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Cornerstone · Grades 3–5 Keystones #1 23 November 2012 Skills week 1 of 7
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Five GCSE retrieval questions · 23 November 2012 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄7 + 3⁄5

    Answer: 26⁄35
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 69

    Answer: x = 12
  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 115 in the ratio 1:2:2

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

    Calculate the mean of: 16, 7, 18, 26, 36, 8

    Answer: 18.5

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