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Cornerstone · Grades 3–5 Keystones #1 9 January 2011 Skills week 1 of 7
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Five GCSE retrieval questions · 9 January 2011 · mathsvault.uk/keystones

  1. 1. Number Adding fractions

    Calculate: 2⁄5 + 2⁄5

    Answer: 4⁄5
  2. 2. Algebra Two-step equations

    Solve: 4x - 17 = 39

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

    Calculate the hypotenuse when a = 5cm and b = 13cm. Give your answer to 2 decimal places

    Answer: 13.93cm
  4. 4. Ratio Sharing in a ratio

    Divide 84 in the ratio 1:2:3

    Answer: 14, 28 and 42
  5. 5. Statistics Mean

    Calculate the mean of: 46, 20, 42, 5, 44, 38

    Answer: 32.5

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