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Cornerstone · Grades 3–5 Keystones #1 13 December 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 13 December 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Add: 2⁄7 + 3⁄4

    Answer: 29⁄28
  2. 2. Algebra Two-step equations

    Solve: 5x - 12 = 23

    Answer: x = 7
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 12cm and b = 6cm. Give your answer to 2 decimal places

    Answer: 13.42cm
  4. 4. Ratio Sharing in a ratio

    Share 35 in the ratio 2:3

    Answer: 14 and 21
  5. 5. Statistics Mean

    Calculate the mean of: 14, 47, 10, 48, 13, 41. Give your answer to 2 decimal places

    Answer: 28.83

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