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Cornerstone · Grades 3–5 Keystones #1 26 July 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 26 July 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 5⁄6 + 1⁄7

    Answer: 41⁄42
  2. 2. Algebra Two-step equations

    Solve: 4x - 20 = 40

    Answer: x = 15
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 4cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 14.56cm
  4. 4. Ratio Sharing in a ratio

    Share 65 in the ratio 3:2

    Answer: 39 and 26
  5. 5. Statistics Mean

    Calculate the mean of: 19, 15, 10, 9, 24, 41, 48. Give your answer to 2 decimal places

    Answer: 23.71

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