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Cornerstone · Grades 3–5 Keystones #1 29 August 2010 Skills week 1 of 7
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Five GCSE retrieval questions · 29 August 2010 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 1⁄5 + 1⁄5

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

    Solve: 7x - 10 = 18

    Answer: x = 4
  3. 3. Geometry Pythagoras — hypotenuse

    Calculate the hypotenuse when a = 9cm and b = 14cm. Give your answer to 2 decimal places

    Answer: 16.64cm
  4. 4. Ratio Sharing in a ratio

    Share 24 in the ratio 1:2

    Answer: 8 and 16
  5. 5. Statistics Mean

    Calculate the mean of: 38, 17, 34, 37, 50, 31

    Answer: 34.5

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