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Cornerstone · Grades 3–5 Keystones #1 25 June 2013 Skills week 1 of 7
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Five GCSE retrieval questions · 25 June 2013 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄6 + 3⁄7

    Answer: 16⁄21
  2. 2. Algebra Two-step equations

    Solve: 5x + 10 = 70

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

    Calculate the hypotenuse when a = 12cm and b = 7cm. Give your answer to 2 decimal places

    Answer: 13.89cm
  4. 4. Ratio Sharing in a ratio

    Share 77 in the ratio 4:3

    Answer: 44 and 33
  5. 5. Statistics Mean

    Find the mean of: 16, 12, 13, 12, 12

    Answer: 13

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