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Cornerstone · Grades 3–5 Keystones #1 20 November 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 20 November 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 3⁄6 + 5⁄7

    Answer: 17⁄14
  2. 2. Algebra Two-step equations

    Solve: 5x + 9 = 69

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

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

    Answer: 14.14cm
  4. 4. Ratio Sharing in a ratio

    Share 40 in the ratio 1:4

    Answer: 8 and 32
  5. 5. Statistics Mean

    Find the mean of: 10, 3, 10, 13, 9

    Answer: 9

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