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Cornerstone · Grades 3–5 Keystones #1 27 October 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 27 October 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 4⁄6 + 2⁄8

    Answer: 11⁄12
  2. 2. Algebra Two-step equations

    Solve: 4x - 10 = 38

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

    Calculate the hypotenuse when a = 3cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.32cm
  4. 4. Ratio Sharing in a ratio

    Share 28 in the ratio 3:1

    Answer: 21 and 7
  5. 5. Statistics Mean

    Calculate the mean of: 5, 29, 48, 30, 48, 7, 41. Give your answer to 2 decimal places

    Answer: 29.71

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