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Cornerstone · Grades 3–5 Keystones #1 18 November 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 18 November 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 4⁄7 + 1⁄7

    Answer: 5⁄7
  2. 2. Algebra Two-step equations

    Solve: 5x - 9 = 61

    Answer: x = 14
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 5cm and b = 8cm. Give your answer to 2 decimal places

    Answer: 9.43cm
  4. 4. Ratio Sharing in a ratio

    Share 85 in the ratio 3:2

    Answer: 51 and 34
  5. 5. Statistics Mean

    Find the mean of: 18, 12, 14, 3, 3

    Answer: 10

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