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Cornerstone · Grades 3–5 Keystones #1 12 October 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 12 October 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄9 + 4⁄9

    Answer: 2⁄3
  2. 2. Algebra Two-step equations

    Solve: 5x - 8 = 32

    Answer: x = 8
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 7cm and b = 15cm. Give your answer to 2 decimal places

    Answer: 16.55cm
  4. 4. Ratio Sharing in a ratio

    Share 30 in the ratio 2:1

    Answer: 20 and 10
  5. 5. Statistics Mean

    Find the mean of: 8, 13, 14, 5, 10

    Answer: 10

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