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Cornerstone · Grades 3–5 Keystones #1 12 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 12 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 1⁄6 + 2⁄7

    Answer: 19⁄42
  2. 2. Algebra Two-step equations

    Solve: 7x - 13 = 57

    Answer: x = 10
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 14.42cm
  4. 4. Ratio Sharing in a ratio

    Share 105 in the ratio 4:3

    Answer: 60 and 45
  5. 5. Statistics Mean

    Find the mean of: 10, 24, 13, 8, 10

    Answer: 13

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